Ambipolar field-effect transistor (FET) devices were fabricated with a heterostructure of C60 and pentacene, and their p- and n-channel field-effect mobilities were studied as a function of thickness of pentacene thin-films. The observed dependences of the μ values were interpreted in terms of the morphology of the thin films and the band structure of C60/pentacene heterostructure. A complementary metal-oxide-semiconductor (CMOS) circuit was fabricated by integration of two ambipolar FETs, aiming at realization of a new CMOS inverter circuit composed of FETs with the same device structure. The gain of 4, the threshold voltage of 85 V, and the complex output characteristics were explained on the basis of the properties of the component FET devices.
en-copyright= kn-copyright= en-aut-name=KuwaharaEiji en-aut-sei=Kuwahara en-aut-mei=Eiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KusaiHaruka en-aut-sei=Kusai en-aut-mei=Haruka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NaganoTakayuki en-aut-sei=Nagano en-aut-mei=Takayuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=KubozonoYoshihiro en-aut-sei=Kubozono en-aut-mei=Yoshihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=2 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=3 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=4 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=5 en-affil= kn-affil=Department of Chemistry, Okayama University en-keyword=Band structure kn-keyword=Band structure en-keyword=Carbon kn-keyword=Carbon en-keyword=CMOS integrated circuits kn-keyword=CMOS integrated circuits en-keyword=Field effect transistors kn-keyword=Field effect transistors en-keyword=Logic gates kn-keyword=Logic gates en-keyword=Thin films kn-keyword=Thin films en-keyword=Threshold voltage kn-keyword=Threshold voltage en-keyword=Band structures kn-keyword=Band structures en-keyword=Logic gate circuits kn-keyword=Logic gate circuits en-keyword=N-channel field-effective mobilities kn-keyword=N-channel field-effective mobilities en-keyword=Pentacene kn-keyword=Pentacene en-keyword=Logic circuits kn-keyword=Logic circuits END start-ver=1.4 cd-journal=joma no-vol=87 cd-vols= no-issue=14 article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=200510 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Fabrication of C60 field-effect transistors with polyimide and Ba0.4Sr0.6Ti0.96O3 gate insulators en-subtitle= kn-subtitle= en-abstract= kn-abstract=Flexible C60 field-effect transistor (FET) device has been fabricated with polyimide gate insulator on the poly(ethylene terephthalate) substrate, and n-channel normally-off FET properties are observed in this FET device. The field-effect mobility, ?, is estimated to be ~10-2 cm2 V-1 s-1 at 300 K. Furthermore, the C60 FET has been fabricated with high dielectric Ba0.4Sr0.6Ti0.96O3 (BST) gate insulator, showing n-channel properties; the ? value is estimated to be ~10-4 cm2 V-1 s-1 at 300 K. The FET device operates at very low gate voltage, VG, and low drain-source voltage, VDS. Thus these C60 FET devices possess flexibility and low-voltage operation characteristic of polyimide and BST gate insulators, respectively.
en-copyright= kn-copyright= en-aut-name=KubozonoYoshihiro en-aut-sei=Kubozono en-aut-mei=Yoshihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NaganoTakayuki en-aut-sei=Nagano en-aut-mei=Takayuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=HaruyamaYusuke en-aut-sei=Haruyama en-aut-mei=Yusuke kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KuwaharaEiji en-aut-sei=Kuwahara en-aut-mei=Eiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=OchiKenji en-aut-sei=Ochi en-aut-mei=Kenji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=FujiwaraAkihiko en-aut-sei=Fujiwara en-aut-mei=Akihiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Okayama University affil-num=6 en-affil= kn-affil=Okayama University affil-num=7 en-affil= kn-affil=Japan Advanced Institute of Science and Technology en-keyword=fullerene devices kn-keyword=fullerene devices en-keyword=insulated gate field effect transistors kn-keyword=insulated gate field effect transistors en-keyword=polymers kn-keyword=polymers en-keyword=barium compounds kn-keyword=barium compounds en-keyword=strontium compounds kn-keyword=strontium compounds en-keyword=dielectric materials kn-keyword=dielectric materials END start-ver=1.4 cd-journal=joma no-vol=409 cd-vols= no-issue=4-6 article-no= start-page=187 end-page=191 dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=20050630 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Fabrication and characterization of field-effect transistor device with C2v isomer of Pr@C82 en-subtitle= kn-subtitle= en-abstract= kn-abstract=A field-effect transistor (FET) device was fabricated with thin films of C2v isomer of Pr@C82. This device apparently showed n-channel normally-on type FET properties, where non-zero current was observed at gate-source voltage of 0 VGS, of 0V. Normally off FET properties were observed by subtraction of the non-zero current from the drain current.Thus the normally on properties are ascribed to the high bulk current caused by the small energy gap ?0.3 eV. The field-effect mobility for this FET was 1.5 x 10-4 cm2 V-1 s-1 at 320 K, being comparable to those of other endohedral metallofullerene FET devices.
en-copyright= kn-copyright= en-aut-name=NaganoTakayuki en-aut-sei=Nagano en-aut-mei=Takayuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KuwaharaEiji en-aut-sei=Kuwahara en-aut-mei=Eiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KubozonoYoshihiro en-aut-sei=Kubozono en-aut-mei=Yoshihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=FujiwaraAkihiko en-aut-sei=Fujiwara en-aut-mei=Akihiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=2 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=3 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=4 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=5 en-affil= kn-affil=CREST, Japan Science and Technology Agency en-keyword=Field effect transistors kn-keyword=Field effect transistors END start-ver=1.4 cd-journal=joma no-vol=68 cd-vols= no-issue=3 article-no= start-page=951 end-page=956 dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=20050811 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Kinetic-spectrophotometric method for the determination of trace amounts of bromide in seawater en-subtitle= kn-subtitle= en-abstract= kn-abstract=A novel simple, sensitive and rapid kinetic-spectrophotornetric method is proposed for the determination of trace amounts of bromide. The method is based on its catalytic effect on the oxidation of methylene blue (MB) by hydrogen peroxide in strongly acidic solution. The oxidation reaction is activated by large amounts of chloride and can be monitored spectrophotometrically by measuring the decrease in the absorbance of MB at 746 run. The determination of bromide is performed by a fixed-time method at the first 100 s from the initiation of the reaction. Unlike other kinetic-spectrophotornetric methods for the determination of bromide, the proposed method does not require heating the solution. Bromide can be determined in the range from 80 to 960 mu g l(-1) with the detection limit of 35 mu g l(-1). The relative standard deviation of ten replicate determination of 480 mu g l(-1) bromide was 1.4%. The influence of potential interfering ions was studied. The proposed method was satisfactorily applied to the determination of bromide in seawater without interfering effect from chloride ion.
en-copyright= kn-copyright= en-aut-name=UraisinKanchana en-aut-sei=Uraisin en-aut-mei=Kanchana kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=3 ORCID= en-aut-name=NacaprichaDuangjai en-aut-sei=Nacapricha en-aut-mei=Duangjai kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=2 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=3 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=4 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Mahidol University affil-num=5 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University en-keyword=Kinetic-spectrophotometry kn-keyword=Kinetic-spectrophotometry en-keyword=Methylene blue kn-keyword=Methylene blue en-keyword=Bromide kn-keyword=Bromide en-keyword=Seawater kn-keyword=Seawater END start-ver=1.4 cd-journal=joma no-vol=558 cd-vols= no-issue=1-2 article-no= start-page=246 end-page=253 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=20060203 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Synthesis of a chitosan-based chelating resin and its application to the selective concentration and ultratrace determination of silver in environmental water samples en-subtitle= kn-subtitle= en-abstract= kn-abstract=A novel chelating resin using chitosan as a base material, ethylenediamine-type chitosan, has been synthesized for the first time in the present study, and applied to the collection/concentration of ultratrace amounts of silver in environmental water samples. In the present study, ultratrace amounts of silver collected on the resin were eluted and determined by ICP-MS. The resin packed in a 1 mL mini column could adsorb silver selectively and quantitatively at a flow rate of 2 mL min(-1) in the wide pH range from 1 to 8, and silver adsorbed on the resin could be easily recovered by passing 1 M nitric acid as an eluent into the column. High adsorption capacity for silver at pH 5, 0.37 mmol mL(-1) of the resin, was achieved, and t(1/2) of the adsorption is less than 5 min. The effect of chloride on the collection of silver was examined by varying chloride concentrations from 10(-4) to 0.75 M; the results showed that the present resin can be used for the collection/concentration of ultratrace amounts of silver in natural waters, as well as seawater. To ensure the accuracy and the precision of the method, CASS-4 near shore seawater reference material from the NRCC has been analyzed. This is not a certified SRM for silver, but has been used for comparative silver analysis by several groups, who report very similar results to those that are reported here. The developed method using ethylenediamine-type chitosan resin gives 0.7 pg mL(-1) of the detection limit when 50-fold enrichment was used. The proposed method was successfully applied to the determination of silver in tap, river, and seawater samples. en-copyright= kn-copyright= en-aut-name=KatarinaRosi Ketrin en-aut-sei=Katarina en-aut-mei=Rosi Ketrin kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=2 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=3 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=4 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University en-keyword=Chelating resin kn-keyword=Chelating resin en-keyword=Chitosan kn-keyword=Chitosan en-keyword=Determination of silver kn-keyword=Determination of silver en-keyword=Environmental water samples kn-keyword=Environmental water samples en-keyword=ICP-MS kn-keyword=ICP-MS END start-ver=1.4 cd-journal=joma no-vol=581 cd-vols= no-issue=2 article-no= start-page=214 end-page=220 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=20070109 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Functionalization of chitosan with 3,4-dihydroxybenzoic acid for the adsorption/collection of uranium in water samples and its determination by inductively coupled plasma-mass spectrometry en-subtitle= kn-subtitle= en-abstract= kn-abstract=A chitosan resin derivatized with 3,4-dihydroxybenzoic acid moiety (CCTS-DHBA resin) was newly synthesized for the collection/concentration of trace uranium by using cross-linked chitosan (CCTS) as base material, and the adsorption behavior of uranium as well as 60 elements on the resin was examined by passing the sample solutions through a mini-column packed with the resin. After the elution of the collected elements on the resin with 1M HNO3, the eluates were measured by inductively coupled plasma-mass spectrometry (ICP-MS). The CCTS-DHBA resin can adsorb several metal cations and several oxoanionic elements at appropriate pH. Among these metal ions, uranium shows an excellent adsorption behavior on this resin. Uranium as UO22+ species can be adsorbed on the resin by chelating mechanism with adsorption capacity of 330 mg g(-1) resin. Through the column treatment, the complete removal of large amounts of alkali and alkaline earth matrices without any loss of adsorption efficiency over prolonged usage were achieved with this resin. The CCTS-DHBA resin was applied to the adsorption/collection of uranium in tap water, river water and seawater samples with satisfactory results. The validation of the proposed method was carried out by analyzing uranium in the standard reference materials of SLRS-4, CASS-4, and NASS-5 after passing through the CCTS-DHBA resin, and the results showed good agreement with the certified values. en-copyright= kn-copyright= en-aut-name=SabarudinAkhmad en-aut-sei=Sabarudin en-aut-mei=Akhmad kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=2 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=HakimLukman en-aut-sei=Hakim en-aut-mei=Lukman kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=OshitaKoji en-aut-sei=Oshita en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=GaoYun Hua en-aut-sei=Gao en-aut-mei=Yun Hua kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=7 ORCID= affil-num=1 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=2 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=3 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=4 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=5 en-affil= kn-affil=Department of International Conservation Studies, Faculty of International and Industrial Studies, Kibi International University affil-num=6 en-affil= kn-affil=Technical Institute of Physics and Chemistry, Chinese Academy of Sciences affil-num=7 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University en-keyword=Chitosan resin kn-keyword=Chitosan resin en-keyword=3,4-dihydroxybenzoic acid kn-keyword=3,4-dihydroxybenzoic acid en-keyword=Uranium kn-keyword=Uranium en-keyword=Adsorption kn-keyword=Adsorption en-keyword=Water kn-keyword=Water en-keyword=Inductively coupled plasma-mass spectrometry kn-keyword=Inductively coupled plasma-mass spectrometry END start-ver=1.4 cd-journal=joma no-vol=1069 cd-vols= no-issue=2 article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=20050502 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Capillary zone electrophoretic studies of ion association between inorganic anions and tetraalkylammonium ions in aqueous-dioxane media en-subtitle= kn-subtitle= en-abstract= kn-abstract=Ion association between inorganic anions and symmetrical tetraalkylammonium ions, R4N+ (R = Me, Et, Pr, n-Bu, n-Am, and 2-methyl butyl {isoamyl = iAm}) was investigated using ordinary silica capillary by capillary zone electrophoresis. An improved version of the Williams-Vigh method was used for the first time to measure the mobilities of the inorganic anions. Plots of log K-ass against log dielectric constant in various media, revealed a smaller change in K-ass compared to dielectric constant. These plots suggest that the Bjerrum's equation is inadequate in accounting for the associations of ions in a CZE setup.
en-copyright= kn-copyright= en-aut-name=MbunaJulius en-aut-sei=Mbuna en-aut-mei=Julius kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=2 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=3 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=4 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University en-keyword=aqueous-dioxane media kn-keyword=aqueous-dioxane media en-keyword=Williams-Vigh method kn-keyword=Williams-Vigh method en-keyword=ion association kn-keyword=ion association en-keyword=capillary zone electrophoresis kn-keyword=capillary zone electrophoresis END start-ver=1.4 cd-journal=joma no-vol=72 cd-vols= no-issue=5 article-no= start-page=1609 end-page=1617 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=20070118 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Sequential-injection on-line preconcentration using chitosan resin functionalized with 2-amino-5-hydroxy benzoic acid for the determination of trace elements in environmental water samples by inductively coupled plasma-atomic emission spectrometry en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new chelating resin using chitosan as a base material was synthesized. Functional moiety of 2-amino-5-hydroxy benzoic acid (AHBA) was chemically bonded to the amino group of cross-linked chitosan (CCTS) through the arm of chloromethyloxirane (CCTS-AHBA resin). Several elements, such as Ag, Be, Cd, Co, Cu, Ni, Ph, U, V, and rare earth elements (REEs), could be adsorbed on the resin. To use the resin for on-line pretreatment, the resin was packed in a mini-column and installed into a sequential-injection/automated pretreatment system (Auto-Pret System) coupled with inductively coupled plasma-atomic emission spectrometry (ICP-AES). The sequential-injection/automated pretreatment system was a laboratory-assembled, and the program was written using Visual Basic software. This system can provide easy operation procedures, less reagent consumption, as well as less waste production. Experimental variables considered as effective factors in the improvement sensitivity, such as an eluent concentration, a sample and an eluent flow rate, pH of samples, and air-sandwiched eluent were carefully optimized. The proposed system provides excellent on-line collection efficiency, as well as high concentration factors of analytes in water samples, which results in highly sensitive detection of ultra-trace and trace analysis. Under the optimal conditions, the detection limits of 24 elements examined are in the range from ppt to sub-ppb levels. The proposed method was validated by using the standard reference material of a river water, SLRS-4, and the applicability was further demonstrated to the on-line collection/concentration of trace elements, such as Ag, Be, Cd, Co, Cu, Ni, Ph, U, V, and REEs in water samples.
en-copyright= kn-copyright= en-aut-name=SabarudinAkhmad en-aut-sei=Sabarudin en-aut-mei=Akhmad kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=LenghorNarong en-aut-sei=Lenghor en-aut-mei=Narong kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=3 ORCID= en-aut-name=HakimLukman en-aut-sei=Hakim en-aut-mei=Lukman kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=GaoYun-Hua en-aut-sei=Gao en-aut-mei=Yun-Hua kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=7 ORCID= affil-num=1 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=2 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=3 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=4 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=5 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=6 en-affil= kn-affil=Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (CAS) affil-num=7 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University en-keyword=sequential-injection kn-keyword=sequential-injection en-keyword=on-line preconcentration kn-keyword=on-line preconcentration en-keyword=trace elements kn-keyword=trace elements en-keyword=ICP-AES kn-keyword=ICP-AES en-keyword=chitosan resin kn-keyword=chitosan resin END start-ver=1.4 cd-journal=joma no-vol=23 cd-vols= no-issue=12 article-no= start-page=1431 end-page=1434 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=20071211 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Adsorption behavior of cationic and anionic species on chitosan resins possessing amino acid moieties en-subtitle= kn-subtitle= en-abstract= kn-abstract=Chitosan resins modified with amino acids, such as glycine, valine, leucine, and serine, were synthesized for investigating the adsorption behavior of cationic and anionic species, and showed good abilities for the adsorption of trace elements in aquatic media as follows: glycine for lanthanoids at pH 7, leucine for molybdenum at pH 1 - 5, serine for uranium at pH 2 - 7, and amino acids for bismuth at pH 1 - 7. Cationic and anionic species could be adsorbed by a chelating mechanism and an anion-exchange mechanism.
en-copyright= kn-copyright= en-aut-name=OshitaKoji en-aut-sei=Oshita en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of International Conservation Studies for Cultural Properties, Faculty of Cultural Properties, Kibi International University affil-num=2 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=3 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=4 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University en-keyword=CHEMICALLY-MODIFIED CHITOSAN kn-keyword=CHEMICALLY-MODIFIED CHITOSAN en-keyword=SELECTIVE ADSORPTION kn-keyword=SELECTIVE ADSORPTION en-keyword=ICP-MS kn-keyword=ICP-MS en-keyword=COLUMN COLLECTION/CONCENTRATION kn-keyword=COLUMN COLLECTION/CONCENTRATION en-keyword=COMPLEXANE TYPES kn-keyword=COMPLEXANE TYPES en-keyword=PRECIOUS METALS kn-keyword=PRECIOUS METALS en-keyword=DERIVATIVES kn-keyword=DERIVATIVES en-keyword=ION kn-keyword=ION en-keyword=COPRECIPITATION kn-keyword=COPRECIPITATION en-keyword=COPPER(II) kn-keyword=COPPER(II) END start-ver=1.4 cd-journal=joma no-vol=24 cd-vols= no-issue=5 article-no= start-page=665 end-page=668 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=20080510 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Adsorption Properties of Ionic Species on Cross-linked Chitosans Modified with Catechol and Salicylic Acid Moieties en-subtitle= kn-subtitle= en-abstract= kn-abstract=Catechol-type chitosan resin and salicylic acid-type chitosan resin were easily synthesized for use in estimating the adsorption behavior of 34 elements at pH 1 - 7 in aquatic media. The catechol-type chitosan resin could adsorb Cu(II) at pH 3 - 7, In(III) at pH 4 - 6, Pb(II) and lanthanoids at pH 5 - 7, and U(VI) at pH 4 - 7 more effectively than the salicylic acid-type chitosan resin and the cross-linked chitosan resin (base material). Adsorption ability was in the order: catechol-type chitosan resin > salicylic acid-type chitosan resin > cross-linked chitosan resin.
en-copyright= kn-copyright= en-aut-name=OshitaKoji en-aut-sei=Oshita en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of International Conservation Studies for Cultural Properties, Faculty of Cultural Properties, Kibi International University affil-num=2 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=3 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University affil-num=4 en-affil= kn-affil=Department of Chemistry, Faculty of Science, Okayama University en-keyword=CHEMICALLY-MODIFIED CHITOSAN kn-keyword=CHEMICALLY-MODIFIED CHITOSAN en-keyword=SELECTIVE ADSORPTION; ICP-MS kn-keyword=SELECTIVE ADSORPTION; ICP-MS en-keyword=COLUMN COLLECTION/CONCENTRATION kn-keyword=COLUMN COLLECTION/CONCENTRATION en-keyword=COMPLEXANE TYPES kn-keyword=COMPLEXANE TYPES en-keyword=PRECIOUS METALS kn-keyword=PRECIOUS METALS en-keyword=DERIVATIVES kn-keyword=DERIVATIVES en-keyword=COPRECIPITATION kn-keyword=COPRECIPITATION en-keyword=COPPER(II) kn-keyword=COPPER(II) en-keyword=BEHAVIOR kn-keyword=BEHAVIOR END start-ver=1.4 cd-journal=joma no-vol=17 cd-vols= no-issue= article-no= start-page=49 end-page=55 dt-received= dt-revised= dt-accepted= dt-pub-year=1995 dt-pub=19951220 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Determination of Inorganic Anions in Environmental Samples by Capillary Electrophoresis kn-title=キャピラリー電気泳動法による環境試料中の無機陰イオンの定量 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Several inorganic anions in environmental water samples, such as river, rain, tap, and waste waters, were determined by capillary electrophoresis with indirect photometric UV detection. In this study, the use of a polymer coated silica capillary and an anionic organic photometric reagent realized a stable baseline and short analytical time. Nine kinds of anions, Cl(-), Br(-), NO(3)(-), SO(4)(2-), C(2)O(4)(2-), ClO(4)(-), F(-), HPO(4)(2-), and HCO(3)(-), were well separated and detected within 12 minutes. Calibration graphs for the anions showed a good linearity in the range of 0 to 4x10(-4) mol dm(-3). Detection limits of the anions were 2x10(-6) mol dm(-3) (HPO(4)(2-)) to 4x10(-5) mol dm(-3) (NO(2)(-)). Anions in river water (Zasu river) and waste water (Okayama University, North district) were measured over 5 days. The waste water contained various kinds of anions, at high concentrations with its large variation, when compared with the river water. The proposed method offers a simple, rapid, and accurate analysis of anions in water samples. en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name=WadaEiko en-aut-sei=Wada en-aut-mei=Eiko kn-aut-name=和田栄子 kn-aut-sei=和田 kn-aut-mei=栄子 aut-affil-num=2 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学理学部化学科 affil-num=2 en-affil= kn-affil=岡山大学理学部化学科 affil-num=3 en-affil= kn-affil=岡山大学理学部化学科 affil-num=4 en-affil= kn-affil=岡山大学理学部化学科 END start-ver=1.4 cd-journal=joma no-vol=21 cd-vols= no-issue= article-no= start-page=4 end-page=10 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=199908 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Determination of trace metals in environmental water samples by inductively coupled plasma - mass spectrometry (ICP-MS) kn-title=誘導結合プラズマ―質量分析法による環境水中の微量金属の定量 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Trace metals in water samples, such as tap water, river water, and sea water, were determined by inductively coupled plasma-mass spectrometry (ICP-MS). ICP-MS has sufficient sensitivity to detect even below the concentrations of ppt level, and therefore the samples were not pretreated with a concentration column. Practical samples were diluted by lo-fold with ultrapure water and measured directly by ICP-MS. The measuring time of one sample was 2.5 min, and the data for 30 elements were obtained simultaneously. The concentrations of heavy metals, such as Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Sb, and Pb, in the water samples were in the ranges of 0.05~82ng/ml. Zasu river and Sibukawa (sea water) contained various kinds of metals, and the concentration ranges were spread in a wide range; for example, Mg was 25700 ppb and In was 2 ppt. ICP-MS is found to be a useful and a powerful instrument for trace amounts of elements, and can be applied satisfactorily to the environmental water analysis. en-copyright= kn-copyright= en-aut-name=LeeKyue-Hyung en-aut-sei=Lee en-aut-mei=Kyue-Hyung kn-aut-name=李啓? kn-aut-sei=李 kn-aut-mei=啓? aut-affil-num=1 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=2 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学理学部化学科 affil-num=2 en-affil= kn-affil=岡山大学理学部化学科 affil-num=3 en-affil= kn-affil=岡山大学理学部化学科 affil-num=4 en-affil= kn-affil=岡山大学理学部化学科 END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue=5 article-no= start-page=783 end-page=789 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19971010 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Thermodynamic Study of Ion-Association Reactions between Aromatic Anions and Tetrabutylammonium Ion in an Aqueous Solution en-subtitle= kn-subtitle= en-abstract= kn-abstract=A temperature effect on ion-association reactions in an aqueous solution has been studied between nine kinds of aromatic anions and tetrabutylammonium ion (TBA(+)). The ion-association constants (K(ass)) were determined by analyzing the change in the electrophoretic mobility of anions, which was obtained by capillary zone electrophoresis, by a non-linear least-squares method. The mobility of the analyte anions decreased with increasing the amount of TBA(+) added in migrating solutions. The thermodynamic parameters in the reaction were obtained from the change in the K(ass) values by the change in temperature. The values of the entropy change (ΔS°) were positive in the ion-association reactions of all of the anions examined, being in the ranges from 5.8 to 46.1 J K(-1) mol(-1); the contribution of TΔS° in the examined ion associates to the Gibbs free-energy changes is larger than that of enthalpy changes (-ΔT°), except for phthalate ion. The results suggest that some hydrated water molecules were released in the formation of such hydrophobic ion associates, as well as in the cases of previously reported inorganic ion associates. en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 en-keyword=Ion association kn-keyword=Ion association en-keyword=thermodynamic parameters kn-keyword=thermodynamic parameters en-keyword=capillary zone electrophoresis kn-keyword=capillary zone electrophoresis en-keyword=aromatic anions kn-keyword=aromatic anions en-keyword=tetrabutylammonium ion kn-keyword=tetrabutylammonium ion END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue=4 article-no= start-page=575 end-page=579 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=19960810 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Separation and Direct Photometric Determination of Inorganic Anions by Capillary Zone Electrophoresis Using Suppressed Electroosmosis en-subtitle= kn-subtitle= en-abstract= kn-abstract=A simple, sensitive and separative method for the photometric determination of inorganic anions was developed on the basis of suppressed electroosmosis by using a common silica capillary and a simple migrating solution. During the analysis of analyte anions by capillary zone electrophoresis, electroosmotic flow in a silica capillary was suppressed by using low-pH migrating solutions containing sodium sulfate. The stacking effect of sulfate ion was utilized for analyte concentration. Four kinds of inorganic analyte anions examined were detected in sharp signals, and the separation of a nitrate and a nitrite ion was improved by using the low-pH migrating solution with no decrease in detection sensitivity. Calibration graphs for nitrate and nitrite ions showed good linearity in the concentration ranges from about 10(-5) to 10(-4)mol dm(-3), with the detection limit for nitrate ion 4×10(-6)mol dm(-3). Separations of organic anions, such as aromatic sulfonate and carboxylate ions, were also examined; many of them were well separated by the proposed migrating solution. Those organic anions did not interfere with the determination of the inorganic anions. en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaEiko kn-aut-sei=Wada kn-aut-mei=Eiko aut-affil-num=2 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 en-keyword=Capillary zone electrophoresis kn-keyword=Capillary zone electrophoresis en-keyword=inorganic anion kn-keyword=inorganic anion en-keyword=direct photometric detection kn-keyword=direct photometric detection en-keyword=suppressed electroosmosis kn-keyword=suppressed electroosmosis en-keyword=stacking effect kn-keyword=stacking effect END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue=1 article-no= start-page=11 end-page=18 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19970210 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Ion Association Reaction between Divalent Anionic Azo Dyes and Hydrophobic Quaternary Ammonium Ions in Aqueous Solution as Studied by Capillary Zone Electrophoresis en-subtitle= kn-subtitle= en-abstract= kn-abstract=Ion association properties of four kinds of anionic divalent azo dyes were investigated in an aqueous solution containing hydrophobic quaternary ammonium ions. The dyes used in this study possessed a hydroxy and a sulfonate group, which existed as a divalent anion in an alkaline solution. In capillary electrophoresis measurements, the apparent electrophoretic mobility of the dyes decreased along with an increase in the concentration of quaternary ammonium ion (Q(+)) in a migrating solution. Ion association constants of the dyes with Q(+), K(ass), were determined by a simulation method of the mobility change using a non-linear least square method, when 1:1 ion associates formed. The increase in log K(ass) was about 0.07 log unit per one methylene group; that is, the hydrophobicity of a pairing ion played an important role in the ion association reaction in aqueous solutions, as well as ion association in solvent extraction systems. Nitro groups of the dyes slightly affected the ion association constants, whereas the position of the sulfonate group in the azo dyes showed a significant change in ion association constants. en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanakaHiroki kn-aut-sei=Tanaka kn-aut-mei=Hiroki aut-affil-num=2 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 en-keyword=Ion association kn-keyword=Ion association en-keyword=aqueous solution kn-keyword=aqueous solution en-keyword=capillary electrophoresis kn-keyword=capillary electrophoresis en-keyword=azo dye anion kn-keyword=azo dye anion en-keyword=quaternary ammonium ion kn-keyword=quaternary ammonium ion END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=2 article-no= start-page=311 end-page=315 dt-received= dt-revised= dt-accepted= dt-pub-year=1998 dt-pub=19980410 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Equilibrium Study on the Ion Association of Monovalent and Divalent Naphtholsulfonates with Tetrabutylammonium Ion in an Aqueous Solution by Capillary Zone Electrophoresis en-subtitle= kn-subtitle= en-abstract= kn-abstract=The ion-association properties of monovalent and divalent naphtholsulfonate ions were investigated with tetrabutylammonium ion (TBA(+)) as a pairing ion in an aqueous solution. The ion-association constants were obtained by analyzing the change in the electrophoretic mobility of naphtholsulfonate ions in the presence of TBA+ by capillary zone electrophoresis; also, the contribution of a hydroxyl group to the ion associability of monovalent and divalent naphtholsulfonate ions, as well as the electrophoretic mobility of the ions, was investigated. The obtained ion-association constants indicate that the positional isomers possessing anionic groups at the β-position of the naphthalene ring are more associable with TBA(+) than those at the α-position, and that the ion associability of the divalent naphtholsulfonates is larger than those of the monovalent ones, except for 1-naphthol-2-sulfonate. The abnormal associability of 1-naphthol-2-sulfonate can be explained by a synergistic increase in the hydrophilicity of the divalent ion. The difference in the ion associability between the monovalent and divalent naphtholsulfonates, 0.16 in log unit on the average, was smaller than that between the naphthalenesulfonate and naphthalenedisulfonate ions, 0.30 log unit on the average. The electrophoretic mobility of the naphtholsulfonate ions obtained in the absence of TBA(+) is compared with each other, and the contribution of the hydroxyl group is discussed on the basis of the hydration behavior of the naphtholsulfonates. en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhbaYoshitaka kn-aut-sei=Ohba kn-aut-mei=Yoshitaka aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HarukiHiroko kn-aut-sei=Haruki kn-aut-mei=Hiroko aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaEiko kn-aut-sei=Wada kn-aut-mei=Eiko aut-affil-num=4 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 affil-num=5 en-affil= kn-affil=岡山大学 en-keyword=Ion association kn-keyword=Ion association en-keyword=aqueous solution kn-keyword=aqueous solution en-keyword=naphtholsulfonate kn-keyword=naphtholsulfonate en-keyword=capillary zone electrophoresis kn-keyword=capillary zone electrophoresis en-keyword=tetrabutylammonium ion kn-keyword=tetrabutylammonium ion END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=6 article-no= start-page=1181 end-page=1183 dt-received= dt-revised= dt-accepted= dt-pub-year=1998 dt-pub=19981210 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Direct Photometric Determination of Tungstate Ion in the Etching Solutions by Capillary Zone Electrophoresis en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaEiko kn-aut-sei=Wada kn-aut-mei=Eiko aut-affil-num=2 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 en-keyword=Capillary zone electrophoresis kn-keyword=Capillary zone electrophoresis en-keyword=direct photometric detection kn-keyword=direct photometric detection en-keyword=oxoacid anions kn-keyword=oxoacid anions en-keyword=tungstate ion kn-keyword=tungstate ion en-keyword=etching solution kn-keyword=etching solution END start-ver=1.4 cd-journal=joma no-vol=16 cd-vols= no-issue=7 article-no= start-page=731 end-page=738 dt-received= dt-revised= dt-accepted= dt-pub-year=2000 dt-pub=20000710 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Simultaneous Determination of Trace Elements in River-water Samples by ICP-MS in Combination with a Discrete Microsampling Technique after Enrichment with a Chitosan-based Chelating Resin en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new technique for the preconcentration of trace elements and matrix elimination with a chitosan-based chelating resin was proposed as a useful pretreatment prior to a measurement by inductively coupled plasma-mass spectrometry (ICP-MS). A small volume of the sample solution (80 ?l) was discretely introduced into a nebulizer of ICP-MS using a segmented flow injection (SFI) system; a maximum of fifteen elements were simultaneously measured by a single injection. A chitosan-based chelating resin containing iminodiacetate (IDA) functional groups was used for matrix elimination and enrichment of analyte metal ions. Several metal ions, such as Al, Fe, Ni, Co, Cu, Zn, Ag, Cd, Pb and U, were quantitatively retained on the IDA chelating resin in a micro-column (resin: 1 ml) at pH 6, whereas Na, K, Mg and Ca were completely eluted from the column by washing with an ammonium acetate solution. The concentrations of 24 and 26 elements in river water certified reference materials, JAC 0031 and JAC 0032, respectively, were determined by the proposed SFI/ICP-MS system after pretreating the samples with the proposed technique, as well as without any pretreatment. The thus-obtained analytical data were evaluated by comparing them with the reference values, as well as with those obtained in other studies. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=LeeKyue-Hyung kn-aut-sei=Lee kn-aut-mei=Kyue-Hyung aut-affil-num=1 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=2 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=17 cd-vols= no-issue=11 article-no= start-page=1285 end-page=1290 dt-received= dt-revised= dt-accepted= dt-pub-year=2001 dt-pub=20011110 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Highly Sensitive Determination Method for Total Carbonate in Water Samples by Flow Injection Analysis Coupled with Gas-Diffusion Separation en-subtitle= kn-subtitle= en-abstract= kn-abstract=A spectrophotometric method for the determination of total carbonate in water samples was developed. The method is based on the color change of an acid-base indicator in relation to the concentration of permeable gas substances through a membrane. By using a new portable FIA system equipped with a gas-diffusion unit, a highly sensitive and on-site determination of total carbonate in aqueous solutions was investigated. A new color-change system with 4-(2',4'-dinitrophenylazo)-1-naphthol-5-sulfonic acid (DNN5S) was developed. Absorbance changes of the reagent solution were measured at 450 nm with a light-emitting diode (LED) as a light source. A new type of gas-diffusion unit was used, and was constructed with double tubing: the inner tubing was a micro porous PTFE (polytetrafluoroethylene) tubing (1.0 mm inner diameter and 1.8 mm outer diameter, pore size 2 μm, porosity 50%); the outer tubing was made of glass with 2.0 mm inner diameter. The optimized system conditions were as follows: the sample size was 200 μl, the temperature of the air bath for the gas-diffusion unit was 25℃, and the length of the gas-diffusion unit was 15 cm; each flow rate was 0.3 ml min(-1). For measuring carbonate at low concentrations, a method for preparing water with less carbonate was proposed: the carbonate content of the water was decreased down to 5×10(-7) M. The calibration graph was rectilinear from 1×10(-6) M to 10(-3) M, and the detection limit (corresponding to a signal-to-noise ratio of 3) was 1×10(-6) M of carbonate. The relative standard deviation (RSD) of ten measurements of 2.3×10(-5) M Na(2)CO(3) solution was 1.9%. The total carbonate in various kinds of water (such as river, sea, rain, distilled and ultra purified) was determined. en-copyright= kn-copyright= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=1 ORCID= en-aut-name=WeiYanlin en-aut-sei=Wei en-aut-mei=Yanlin kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=YamamotoMasaki en-aut-sei=Yamamoto en-aut-mei=Masaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=TanakaHiroki en-aut-sei=Tanaka en-aut-mei=Hiroki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=5 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 affil-num=5 en-affil= kn-affil=岡山大学 affil-num=6 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=18 cd-vols= no-issue=9 article-no= start-page=1021 end-page=1025 dt-received= dt-revised= dt-accepted= dt-pub-year=2002 dt-pub=20020910 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Equilibrium Analysis of Reactions of Metal-Pyridylazoresorcinolato Chelates with Quaternary Ammonium Ion, Nonionic Surfactant and Polyethylene Glycol in Aqueous Solution by Capillary Zone Electrophoresis en-subtitle= kn-subtitle= en-abstract= kn-abstract=The resolutions of metal-4-(2-pyridylazo)resorcinol chelates by capillary zone electrophoresis (CZE) were investigated in the presence of some interacting reagents; also, equilibrium reactions between the chelates and the interacting reagents were analyzed in an aqueous solution. Among nine metal chelates formed in aqueous solution, the chelates of V(V), Fe(II), Co(III), Ni(II), and Cu(II) were resolved and detected by CZE, while other chelates were decomposed during electrophoretic migration. The electrophoretic mobility of the chelates of Fe(II), Ni(II), and Cu(II) increased with increasing pH of the migrating solution; also, the acid-dissociation constants of these three chelates were determined by analyzing the mobility change. The ion-association constants of the five anionic chelates and pyridylazoresorcinolate ion with quaternary ammonium ions were also determined by analyzing the mobility change. The binding behavior of the ligand and its chelates with nonionic surfactant micelle, as well as with polyethylene glycol, were investigated, and their binding constants were determined through the mobility change. When Brij 35 was used as a nonionic surfactant interacting with the anionic chelates, the FeII chelate decomposed at Brij 35 concentrations over 6.67 mM. The equilibrium constants and the reactivity were compared with each other. en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=45 cd-vols= no-issue=7 article-no= start-page=697 end-page=699 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=19960705 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Direct photometric detection of inorganic anions by capillary zone electrophoresis using stacking effect of sulfate ion on sample ions kn-title=硫酸イオンの試料イオンに対するスタッキング効果を利用する無機陰イオンのキャピラリー電気泳動/直接吸光分析 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Stacking effect of sulfate ion on the analysis of inorganic anions by capillary zone electrophoresis was examined during the sample injection period. A used silica capillary was dynamically coated with tetradecyltrimethylammonium bromide (TDTMA(+)Br(-)) to control the electroosmotic flow. Analyte anions were directly detected by photometry at 214 nm. Five kinds of anions, namely bromide, nitrite, nitrate, molybdate, and tungstate, were detected. Anion separation was developed using 4×10(-3) M sodium sulfate in the carrier solution. Peak heights for anions increased along with additional Na(2)SO(4). The stacking effect was more effective for the anions with high mobility than those with low mobility. Calibration graphs for nitrate and nitrite showed good linearity in the concentration range of 10(-6) to 10(-5) M. en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name=HiroiYasuko en-aut-sei=Hiroi en-aut-mei=Yasuko kn-aut-name=廣井康子 kn-aut-sei=廣井 kn-aut-mei=康子 aut-affil-num=2 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 en-keyword=capillary zone electrophoresis kn-keyword=capillary zone electrophoresis en-keyword=inorganic anion kn-keyword=inorganic anion en-keyword=stacking effect kn-keyword=stacking effect en-keyword=direct photometric detection kn-keyword=direct photometric detection END start-ver=1.4 cd-journal=joma no-vol=46 cd-vols= no-issue=6 article-no= start-page=467 end-page=475 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19970605 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Analysis of ion-association reactions between quaternary ammonium ions and monovalent organic anions by capillary zone electrophoresis kn-title=キャピラリー電気泳動法による第四級アンモニウムイオンと一価有機酸イオンとのイオン会合反応の解析 en-subtitle= kn-subtitle= en-abstract=水溶液内におけるイオン会合反応を調べる方法として,イオンの電気泳動移動度の変化を利用する方法を開発し,一価-一価イオン間の比較的弱いイオン会合反応を解析することに初めて成功した.イオン会合系として,ベンゼン環,ナフタレン環を有する9種類の一価有機酸イオン,二価の1,3-ベンゼンジスルホン酸イオンと,第四級アンモニウムイオンとの間での反応を検討した.アルカリ性(pH11.7)の泳動液中におけるこれら陰イオンの電気泳動移動度は,泳動液に添加した第四級アンモニウムイオン濃度の増加に伴って低下した.この移動度の変化は,キャピラリー電気泳動法で求めた.移動度の変化を非線形最小二乗法及び幾つかの線形法により解析し,各々のイオン会合定数を得た.得られたイオン会合定数はナフタレン骨格を有するものがベンゼン骨格を有するものよりも大きく,かさ高い対陽イオンを用いた場合に大きいことから,疎水性の寄与が示唆された.又,ナフタレン環を持つ有機酸イオンの異性体では,α-位置換体よりもβ-位置換体のほうがイオン会合定数が大きい.これは酸解離定数(pK(a))の大きさの序列と一致した.置換基の種類によるイオン会合性の差は,イオン会合抽出における差よりも小さいことが分かった.イオン会合抽出の結果も考え合わせると,フェノレート,ベンゾエートイオンでは,水溶液内イオン会合の寄与がかなり大きいことが分かった. kn-abstract=Ion-association reactions in an aqueous solution between monovalent aromatic anions and quaternary ammonium ions were analyzed by means of the electrophoretic mobility. The electrophoretic mobility of analytes, such as phenolate, benzoate, benzenesulfonate, 1, 3-benzenedisulfonate, 1- and 2- naphtholate, 1- and 2- naphthalenecarboxylate, and 1-and 2- naphthalenesulfonate, was obtained by capillary zone electrophoresis. The electrophoretic mobility of analyte anions decreased with increasing the concentrations of the quaternary ammonium ions added in migrating solutions. The change in the electrophoretic mobility was analyzed to obtain the ion-association constants (K(ass)) by a nonlinear least-squares analysis method, as well as linear-square analysis methods. The obtained ion-association constants were larger in the anions possessing naphthalene ring than in those possessing benzene ring. The values of K(ass) became larger when more bulky cations were used as a pairing ion, indicating that the hydrophobicity of ions contributed to the ion associability. The ion associablities of β-substituted naphthalene isomers were larger than those of the α-substituted type, which agreed with the acid-dissociation property of the anions. The difference in the K(ass) values among functional groups was small, compared with ion-pair extraction constant (K(ex)) of the ion associates. en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name=WadaEiko en-aut-sei=Wada en-aut-mei=Eiko kn-aut-name=和田栄子 kn-aut-sei=和田 kn-aut-mei=栄子 aut-affil-num=2 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 en-keyword=ion association kn-keyword=ion association en-keyword=aqueous solution kn-keyword=aqueous solution en-keyword=capillary zone electrophoresis kn-keyword=capillary zone electrophoresis en-keyword=quaternary ammonium ions kn-keyword=quaternary ammonium ions en-keyword=aromatic anions kn-keyword=aromatic anions END start-ver=1.4 cd-journal=joma no-vol=47 cd-vols= no-issue=12 article-no= start-page=953 end-page=958 dt-received= dt-revised= dt-accepted= dt-pub-year=1998 dt-pub=19981205 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Kinetic study of the formation of triphenylmethanols from cationic triphenylmethane dyes in the presence of nonionic surfactant micelles kn-title=非イオン界面活性剤ミセル存在下におけるトリフェニルメタン系陽イオン染料からトリフェニルメタノール生成の速度論的研究 en-subtitle= kn-subtitle= en-abstract=トリフェニルメタン系陽イオン染料から対応するトリフェニルメタノールへの加水分解反応について,非イオン界面活性剤ミセルの効果を速度論的に検討した.非イオン界面活性剤であるTriton X-100,PONPE-20,Brij-35,Brij-58のミセルが存在する水溶液中では,上記反応速度は陽イオン界面活性剤(STMA(+)) ミセルの存在下と同程度に促進された.非イオン界面活性剤の中ではTriton X-100が最も効果が高く,水酸化物イオンとの反応速度は10(2.0)〜10(3.7)倍増加した.検討した5種類のトリフェニルメタン系陽イオン染料の中では,マラカイトグリーン,ブリリアントグリーンで反応が大きく促進された.又,ミセルを形成する非イオン界面活性剤分子の疎水性バランスの増加とともに反応速度は増加した.これは,生成したトリフェニルメタノールがミセルのコアをなす疎水性部に取り込まれやすい場合ほど,反応速度が促進されるものと考えられる. kn-abstract=The formation rates of triphenylmethanols from corresponding cationic triphenylmethane dyes were investigated in the presence of nonionic surfactant micelles, such as Triton X-100, PONPE-20, Brij-35 and Brij-58. The increases in the formation rates of triphenylmethanols with the hydroxide ion in a nonionic micellar solution were almost comparable to that in the presence of a cationic micelle of stearyltrimetylammonium ion. The increase in the rate was largest with Triton X-100, and the rates with the hydroxide ion increased on the order of about 10(2.0)10(3.7) fold compared with those in an aqueous solution. The reaction rates for malachite green and brilliant green increased most significantly among the five dyes examined. The rates also increased along with an increase in the hydrophobicity (lipophilicity) balance of the surfactant molecule. These results indicate that the cationic dyes are adsorbed on the hydrophobic core of the surfactant micelle, and that the formed triphenylmethanols are incorporated in the core. en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name=MiyaTomoko en-aut-sei=Miya en-aut-mei=Tomoko kn-aut-name=宮智子 kn-aut-sei=宮 kn-aut-mei=智子 aut-affil-num=2 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 en-keyword=nonionic surfactant micelle kn-keyword=nonionic surfactant micelle en-keyword=triphenylmethane dye kn-keyword=triphenylmethane dye en-keyword=kinetics kn-keyword=kinetics en-keyword=acceleration kn-keyword=acceleration END start-ver=1.4 cd-journal=joma no-vol=51 cd-vols= no-issue=9 article-no= start-page=785 end-page=789 dt-received= dt-revised= dt-accepted= dt-pub-year=2002 dt-pub=20020905 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Highly sensitive determination of copper ion with newly synthesized water-soluble fluorescent reagents having a 1,8-diaminonaphthalene-3,6-disulfonic acid skeleton kn-title=1,8-ジアミノナフタレン-3,6-ジスルホン酸骨格を持つ新規水溶性蛍光試薬の合成と銅イオンの高感度定量への応用 en-subtitle= kn-subtitle= en-abstract=水溶性蛍光試薬として1,8-ジヒドロキシナフタレン-3,6-ジスルホン酸 (クロモトロープ酸) に類似した1,8-ジアミノナフタレン-3,6-ジスルホン酸骨格を持つ1,8-ジ-(トルエン-4-スルホニルアミノ)-ナフタレン-3,6-ジスルホン酸 (BTND) 及び1,8-ジ-(トリフルオロメタンスルホニルアミノ)-ナフタレン-3,6-ジスルホン酸 (BTFND) を合成し, 金属イオンとの反応性を検討した. BTFNDは検討した8種類の金属イオンと反応し消蛍光を示した. またBTNDは銅 (II) イオンと選択的に反応することが分かった. BTNDは水溶液中pH7で銅 (II) イオンと定量的に反応し, 消蛍光を示したので, 検量線を作成したところ, 銅濃度0〜10(-6)Mの範囲で直線関係を示した (λ(ex)=360nm, λ(em)=405nm). 本法の銅 (II) イオンの検出下限は2.0×10(-7)Mであった. BTNDは水溶液中で反応し, 定量操作が簡便で, 銅 (II) イオンに対する高感度・高選択的な蛍光試薬であることが分かった. kn-abstract=Water-soluble fluorescent reagents, 1,8-di-(toluene-4-sulfonylamino)-naphthalene-3,6-disulfonic acid (BTND) and 1,8-di-(trifluoromethanesulfonylamino)-naphthalene-3,6-disulfonic acid (BTFND), were newly synthesized. The reactivities of these fluorescent reagents to Cu(2+), Ni(2+), Co(2+), Cd(2+), Pb(2+), V(V), Ag(+), Fe(3+), and Mg(2+) were examined. BTFND was reacted with 8 metal ions, except for Pb(2+), to show fluorescence quenching. BTND was selective to Cu(2+), and the fluorescence was quenched quantitatively at pH 7 in an aqueous solution (λ(ex)=360 nm and λ(em)=405 nm). The calibration graph for Cu(2+) with BTND was rectilinear over the concentration range from 0 to 10(-5) M and the detection limit was 2.0×10(-7) M. BTND has many advantages, such as selectivity for Cu(2+), high sensitivity, and a simple procedure. en-copyright= kn-copyright= en-aut-name=NomuraKazuhiro en-aut-sei=Nomura en-aut-mei=Kazuhiro kn-aut-name=野村一央 kn-aut-sei=野村 kn-aut-mei=一央 aut-affil-num=1 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=2 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 en-keyword=determination of copper ion kn-keyword=determination of copper ion en-keyword=1,8-di-(toluene-4-sulfonylamino)-naphthalene-3,6-disulfonic acid kn-keyword=1,8-di-(toluene-4-sulfonylamino)-naphthalene-3,6-disulfonic acid en-keyword=1,8-di-(trifluoromethane-4-sulfonylamino)-naphthalene-3,6-disulfonic acid kn-keyword=1,8-di-(trifluoromethane-4-sulfonylamino)-naphthalene-3,6-disulfonic acid en-keyword=fluorescence detection kn-keyword=fluorescence detection END start-ver=1.4 cd-journal=joma no-vol=51 cd-vols= no-issue=9 article-no= start-page=791 end-page=795 dt-received= dt-revised= dt-accepted= dt-pub-year=2002 dt-pub=20020905 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Determination of trace metal impurities in nickel and iron salts using 2-(5-Nitro-2-pyridylazo)-5-(N-propyl-N-sulfopropyl-amino)phenol by capillary zone electrophoresis kn-title=2-(5-ニトロ-2-ピリジルアゾ)-5-(N-プロピル-N-スルホプロピルアミノ)フェノールを用いるキャピラリー電気泳動法によるニッケル, 鉄塩中の極微量不純物の定量 en-subtitle= kn-subtitle= en-abstract=市販金属塩中の極微量金属不純物の定量法として, 2-(5-ニトロ-2-ピリジルアゾ)-5-(N-プロピル-N-スルホプロピルアミノ)フェノール (Nitro-PAPS) とのキレートを分離, 検出するキャピラリー電気泳動法について検討した. 各種金属イオンと定量的に反応するpH7の条件では, 高感度検出が可能であるが, 多くの金属錯体の分離は十分でない. そこで, 電気浸透流やキレートの電気泳動移動度を変化させる効果のある第四級アンモニウム塩等の添加を検討し, 種々な相互作用試薬を用いて分離の改善を図った. その結果, 臭化セチルトリメチルアンモニウムの添加で電気浸透流が抑制され, 硫酸ナトリウムの添加によるスタッキング効果の活用によりシグナルが鋭敏化され, 尿素の添加でニトロ基周りの水和を抑制したところ, 金属キレートの分離性能が向上した. 本法により10(-7)MレベルのFe, Co, Ni, Cuの分離定量が可能になり, 市販特級金属塩中の極微量金属の分析に適用したところ, ppm (=10(-6)g/g) レベルの金属不純物を定量することができた. kn-abstract=2-(5-Nitro-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol (Nitro-PAPS) was used for a quantitative determination of ultratrace-level metal ions in commercially available metal salts by capillary zone electrophoresis. At pH 7, Nitro-PAPS reacts with various metal ions to form chelate compounds having large molar absorptivities. Although chelate formation is useful for the highly sensitive detection of metal ions, the resolution of the metal complexes is poor at pH 7. Cetyltrimethylammonium bromide was added to suppress any electroosmotic flow. The hydration of nitro groups of a chelating agent and chelates was controlled by the addition of urea. Sodium sulfate was also utilized to sharpen the signals of metal chelates by a field-enhanced stacking effect. As a result, the resolution was improved and the determination of 10-7 M level metal ions was possible. The proposed method was applied to the analysis of metal impurity at ultratrace levels in commercially available nickel and iron salts. en-copyright= kn-copyright= en-aut-name=KagawaTakuji en-aut-sei=Kagawa en-aut-mei=Takuji kn-aut-name=香川拓司 kn-aut-sei=香川 kn-aut-mei=拓司 aut-affil-num=1 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=2 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 en-keyword=capillary zone electrophoresis kn-keyword=capillary zone electrophoresis en-keyword=metal ions kn-keyword=metal ions en-keyword=2-(5-nitro-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol kn-keyword=2-(5-nitro-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol en-keyword=nickel and iron salt kn-keyword=nickel and iron salt en-keyword=impurity analysis kn-keyword=impurity analysis END start-ver=1.4 cd-journal=joma no-vol=53 cd-vols= no-issue=1 article-no= start-page=1 end-page=6 dt-received= dt-revised= dt-accepted= dt-pub-year=2004 dt-pub=2004 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Development of a micro-flow titration method and application to acid-base titration kn-title=微量フロー滴定分析法の開発と酸塩基滴定への応用 en-subtitle= kn-subtitle= en-abstract=A flow titration analysis method based on flow ratiometry was developed in this study from the viewpoint of simplicity, rapidity, automation, and cost efficiency. Sample and titrant solutions react while the solutions are continuously propelled by individual pumps at different flow rates. The flow rates are accurately controlled and changed independently, and the color change of an indicator gives an equivalent point. The concentration of analyte was determined by using the ratio of the flow rate and the equivalent point. The fundamental properties of the flow titration method were evaluated through acid-base titration, and compared with the conventional manual titration. When Phenolphthalein or Cresol Red was used as an indicator added in either the sample solution or the titrant solution, linear calibration graphs were obtained for all titrations examined, including strong and weak acids. The proposed method was applied to the titration of carbonate salt using Bromocresol Green and Phenolphthalein. Two isolated end-points were obtained in one sequential measurement corresponding to carbonate and bicarbonate ions. The proposed titration method was applied to the analysis of commercial vinegar samples. The results agreed well with the ones obtained by the conventional titration method; the relative standard deviations for the end point were within 0.3%. The volume of wastewater per one measurement can be reduced down to about 100 μl by the proposed method, while a practical method requires about 50 ml. kn-abstract=容量分析法の簡便化，迅速化，自動化及び省力化を含む高機能化を目的として，送液ポンプの流量比に基づくフロー滴定システムの構築と応用について検討した．フロー滴定分析法は，連続して流れる試料液，滴定剤溶液の正確な流量制御を基本原理としている．2台の送液ポンプを用いてそれらの流量を変化させながら試料液（被滴定液）と滴定剤（滴定液）を送液し，流れ内において混合・反応させ，指示薬の変色を用いて試料液中の分析対象物質濃度を流量比から定量する容量分析法である．各種酸塩基滴定を通して本法の性能評価を行い，従来法との比較を行った．酸塩基指示薬としてフェノールフタレイン，あるいはクレゾールレッドを試料液又は滴定剤へ添加したところ，強酸，弱酸を問わず検討したすべての系において直線性の高い検量線が得られた．また，終点検出の相対標準偏差は0.3％未満であった．更に，滴定剤に2種類の指示薬を用いる多塩基酸・多酸塩基の連続滴定法について検討した．炭酸塩の分析ではブロモクレゾールグリーンとフェノールフタレインを指示薬として用い，炭酸イオン，重炭酸イオンに由来する二つの当量点を一試料測定で検出できた． 本法を市販されている食酢の分析に適用したところ，従来法により決定した酢酸濃度と良好な一致を得た．1試料測定当たりの廃液量は50 ml程度から100 μl程度まで大幅に低減化することができ，フロー滴定分析法により全操作の自動化，試料・廃液量の大幅な低減化，滴定時間の短縮等の高機能化を達成した． en-copyright= kn-copyright= en-aut-name=KonishiHironobu en-aut-sei=Konishi en-aut-mei=Hironobu kn-aut-name=小西明伸 kn-aut-sei=小西 kn-aut-mei=明伸 aut-affil-num=1 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=2 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学理学部化学科 affil-num=2 en-affil= kn-affil=岡山大学理学部化学科 affil-num=3 en-affil= kn-affil=岡山大学理学部化学科 affil-num=4 en-affil= kn-affil=岡山大学理学部化学科 en-keyword=flow titration analysis kn-keyword=flow titration analysis en-keyword=flow ratiometry kn-keyword=flow ratiometry en-keyword=acid-base titration kn-keyword=acid-base titration END start-ver=1.4 cd-journal=joma no-vol=53 cd-vols= no-issue=7 article-no= start-page=723 end-page=728 dt-received= dt-revised= dt-accepted= dt-pub-year=2004 dt-pub=20041022 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Separation and determination of n-alkylamines by reversed-phase high-performance liquid chromatography coupled with merging zone derivatization to water-soluble Schiff bases kn-title=水溶性シッフ塩基へのマージングゾーン誘導体化/逆相分配高速液体クロマトグラフィーによるn-アルキルアミン類の分離定量 en-subtitle= kn-subtitle= en-abstract=n-アルキルアミン類の分離定量法として，陰イオン性アルデヒドを誘導体化試薬として用いる吸光検出-逆相分配高速液体クロマトグラフィーを検討した．誘導体化試薬としては，サリチルアルデヒド-5-スルホン酸イオン（SAS）と4-（4-スルホフェニルアゾ）-1-ヒドロキシ-2-ナフトアルデヒド（SPAHNA）を用いた．n-アルキルアミンを含む試料溶液と試薬溶液はそれぞれの流路に同時に注入され，マージングゾーン法によりオンラインで混合され，5 m，70℃ の反応コイル中で水溶性シッフ塩基へと誘導体化された．生成した水溶性シッフ塩基は逆相カラムにより分離され，吸光検出された．オンライン誘導体化とカラム分離/検出を含む分析時間は，SASを用いた場合25分，SPAHNAを用いた場合は18分であった．アルキルアミン類に対する検量線は0〜50 μMの範囲で良好な直線性が得られ，検出限界は，SASを用いた場合0.5〜1.0 μM，SPAHNAを用いた場合は0.08〜0.20 μMであった． kn-abstract=Separation and determination of n-alkylamines were investigated with anionic aldehydes to form water-soluble Schiff bases by using reversed-phase high-performance liquid chromatography (RP-HPLC). Two labeling reagents of salicylaldehyde-5-sulfonate (SAS) and 4-(4-sulfophenylazo)-1-hydroxy-2-naphthaldehyde (SPAHNA) were investigated. Sample solution containing the analytes and reagent solution were simultaneously injected and merged in the flow line, and water-soluble Schiff bases were formed in the reaction tube with its length of 5 m and at 70°C. The Schiff bases were resolved with water-methanol eluent on a reversed-phase column and photometrically detected. The entire analysis time including on-line derivatization, column separation and detection was accomplished within 25 min with SAS and 18 min with SPAHNA. The determination range for the n-alkylamines are 0?50 μM with the limit of detections at 0.5?1.0 μM for SAS and 0.08?0.20 μM for SPAHNA. en-copyright= kn-copyright= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=DriouichRim kn-aut-sei=Driouich kn-aut-mei=Rim aut-affil-num=2 ORCID= en-aut-name=SawaiKuniko en-aut-sei=Sawai en-aut-mei=Kuniko kn-aut-name=澤井邦子 kn-aut-sei=澤井 kn-aut-mei=邦子 aut-affil-num=3 ORCID= en-aut-name=LiQiong en-aut-sei=Li en-aut-mei=Qiong kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=5 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=岡山大学理学部化学科 affil-num=2 en-affil= kn-affil=岡山大学理学部化学科 affil-num=3 en-affil= kn-affil=岡山大学理学部化学科 affil-num=4 en-affil= kn-affil=岡山大学理学部化学科 affil-num=5 en-affil= kn-affil=岡山大学理学部化学科 affil-num=6 en-affil= kn-affil=岡山大学理学部化学科 en-keyword=n-alkylamines kn-keyword=n-alkylamines en-keyword=salicylaldehyde-5-sulfonate kn-keyword=salicylaldehyde-5-sulfonate en-keyword=4-(4-sulfophenylazo)-1-hydroxy-2-naphthaldehyde kn-keyword=4-(4-sulfophenylazo)-1-hydroxy-2-naphthaldehyde en-keyword=merging zone kn-keyword=merging zone en-keyword=reversed-phase HPLC kn-keyword=reversed-phase HPLC END start-ver=1.4 cd-journal=joma no-vol=53 cd-vols= no-issue=9 article-no= start-page=919 end-page=923 dt-received= dt-revised= dt-accepted= dt-pub-year=2004 dt-pub=20041224 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Determination of anionic surfactants using newly synthesized n-dialkyl-2,2'-thiacyanine dyes kn-title=シアニン系新規合成試薬を用いる陰イオン界面活性剤の定量 en-subtitle= kn-subtitle= en-abstract=水溶液一相系でイオン会合反応を利用する陰イオン界面活性剤直接定量のための陽イオン性染料を新規に合成した．基本骨格はシアニンとし，二つのNに炭素数の異なるn -アルキル鎖を導入した四級塩染料を合成した．アルキル鎖の炭素数4と6のものは新規合成化合物であり，(p)K(a)を求めた．炭素数2と3の市販品と合成した陽イオン試薬を用い，吸光光度法により陰イオン界面活性剤（DBS）との最適反応条件を検討した．3,3'-ジヘキシル-2,2'-チアシアニン（DHT，C6の試薬）を用いて，10(−6) MオーダーのDBSを定量することができ，検出下限は4×10(−7) Mであった．また，疎水性相互作用により，非イオン性界面活性剤，陽イオン界面活性剤とも反応することが分かり，DHTとのイオン会合定数を求めた． kn-abstract=For the spectrophotometric determination of anionic surfactants in aqueous media, cationic dyes with a 2,2'-thiacyanine skeleton were newly synthesized. Carbon numbers of 4 and 6 in the n-dialkyl chain combined at the N position of 2,2'-thiacyanine are new compounds. Fundamental information, such as the (p)K(a) values, was obtained. These two compounds and purchased diethyl- and dipropyl-2,2'-thiacyanine were examined for the spectrophotometric determination of an anionic surfactant, DBS. Of these, 3,3'-dihexyl-2,2'-thiacyanine (DHT) showed the best sensitivity. The calibration graph for DBS with DHT was linear up to 1×10(?5) M, and the detection limit was 4×10(?7) M. By a hydrophobic interaction, even a cationic surfactant, Zephiramine, and a nonionic surfactant, Triton X-100, could react with DHT. The ion-association constants for these surfactants with DHT were obtained. en-copyright= kn-copyright= en-aut-name=GotoAkinori en-aut-sei=Goto en-aut-mei=Akinori kn-aut-name=後藤晃範 kn-aut-sei=後藤 kn-aut-mei=晃範 aut-affil-num=1 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=2 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=3 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学理学部 affil-num=2 en-affil= kn-affil=岡山大学理学部 affil-num=3 en-affil= kn-affil=岡山大学理学部 affil-num=4 en-affil= kn-affil=岡山大学理学部 en-keyword=n-dialkyl-2,2'-thiacyanine dyes kn-keyword=n-dialkyl-2,2'-thiacyanine dyes en-keyword=surfactants kn-keyword=surfactants en-keyword=ion association kn-keyword=ion association en-keyword=spectrophotometry kn-keyword=spectrophotometry END start-ver=1.4 cd-journal=joma no-vol=55 cd-vols= no-issue=9 article-no= start-page=707 end-page=713 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=20061117 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Development of Computer-Controlled Flow Injection Instruments and Its Application to Determination of Nitrate, Nitrite, and Ammonium Ions in Environmental Samples kn-title=コンピュータ制御されたフローインジェクション分析装置の開発と環境水中の硝酸イオン，亜硝酸イオン，アンモニウムイオン定量への応用 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Flow injection analysis (FIA) systems with low power consumption and personal-computer control were developed by using solenoid pumps and an LED detector. Both programs for controlling the system and acquiring measurement data were written using LabVIEW. The FIA system was applied to the determination of nitrite ion in river-water samples based on diazotization and coupling reactions. Linear calibration graphs were obtained with the combination of pump(s) and photometric detector in the concentration range of nitrite ion at 0.5?3.0 × 10?6 M. Nitrate and nitrite ions were also determined simultaneously by the system by using a Cd/Cu reduction column and a by-pass flow. Determination of ammonia in river-water samples was also realized by the system with a modified indophenol reaction. en-copyright= kn-copyright= en-aut-name=JoichiYasutaka en-aut-sei=Joichi en-aut-mei=Yasutaka kn-aut-name=城市康隆 kn-aut-sei=城市 kn-aut-mei=康隆 aut-affil-num=1 ORCID= en-aut-name=NarongLenghor en-aut-sei=Narong en-aut-mei=Lenghor kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=3 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=4 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=5 ORCID= en-aut-name=UraNobuo en-aut-sei=Ura en-aut-mei=Nobuo kn-aut-name=浦信夫 kn-aut-sei=浦 kn-aut-mei=信夫 aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=岡山大学理学部化学科 affil-num=2 en-affil= kn-affil=岡山大学大学院自然科学研究科機能分子化学専攻 affil-num=3 en-affil= kn-affil=岡山大学大学院自然科学研究科機能分子化学専攻 affil-num=4 en-affil= kn-affil=岡山大学大学院自然科学研究科機能分子化学専攻 affil-num=5 en-affil= kn-affil=岡山大学大学院自然科学研究科機能分子化学専攻 affil-num=6 en-affil= kn-affil=株式会社相馬光学 en-keyword=Flow injection analysis kn-keyword=Flow injection analysis en-keyword=LabVIEW control kn-keyword=LabVIEW control en-keyword=solenoid pumps kn-keyword=solenoid pumps en-keyword=nitrate ion kn-keyword=nitrate ion en-keyword=nitrite ion kn-keyword=nitrite ion en-keyword=ammonia kn-keyword=ammonia END start-ver=1.4 cd-journal=joma no-vol=55 cd-vols= no-issue=9 article-no= start-page=715 end-page=720 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=20061117 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Highly Efficient and Automatic Collection/Concentration with Chelating Resin for Inductively Coupled Plasma Atomic Emission Spectroscopy kn-title=誘導結合プラズマ発光分析のためのキレート樹脂を用いる高効率自動前処理濃縮 en-subtitle= kn-subtitle= en-abstract= kn-abstract=An automatically controlled collection/concentration system for ICP-AES was developed. Elements were collected with small chelating disks and chelating resin with the iminodiacetate moiety packed in a line filter. This column was installed in a 6-way valve on the pretreatment system, which could be connected on line to ICP-AES. The flow rate was 1 ml min?1 and conditioning of the chelating disk was carried out by flowing 0.5 M ammonium acetate (pH 5.5) for 2 min, sampling for 5 min and washing for 1 min. Elution was done by passing through 2 M HNO3 at 1.3 ml min?1 for 1 min. Bi, Cd, Co, Cr, Cu, Mn, Ni, Pb and V could be determined with 5.0 ml of the sample solution. The enrichment factors were 3?15 times and the collection efficiencies were better than 80%. The detection limits (LOD) were from 0.003 for Mn to 0.311 for Bi, which were several 10 to 100-times lower than that of normal LOD of ICP-AES. This method was successfully applied to the determination of these metals in tap and river-water samples. en-copyright= kn-copyright= en-aut-name=YamamotoTakako en-aut-sei=Yamamoto en-aut-mei=Takako kn-aut-name=山本貴子 kn-aut-sei=山本 kn-aut-mei=貴子 aut-affil-num=1 ORCID= en-aut-name=AkhmadSabarudin en-aut-sei=Akhmad en-aut-mei=Sabarudin kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NoguchiOsamu en-aut-sei=Noguchi en-aut-mei=Osamu kn-aut-name=野口修 kn-aut-sei=野口 kn-aut-mei=修 aut-affil-num=3 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name=高柳俊夫 kn-aut-sei=高柳 kn-aut-mei=俊夫 aut-affil-num=4 ORCID= en-aut-name=OshimaMitsuko en-aut-sei=Oshima en-aut-mei=Mitsuko kn-aut-name=大島光子 kn-aut-sei=大島 kn-aut-mei=光子 aut-affil-num=5 ORCID= en-aut-name=MotomizuShoji en-aut-sei=Motomizu en-aut-mei=Shoji kn-aut-name=本水昌二 kn-aut-sei=本水 kn-aut-mei=昌二 aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=岡山大学理学部化学科 affil-num=2 en-affil= kn-affil=岡山大学大学院自然科学研究科機能分子化学専攻 affil-num=3 en-affil= kn-affil=岡山大学大学院自然科学研究科機能分子化学専攻 affil-num=4 en-affil= kn-affil=岡山大学大学院自然科学研究科機能分子化学専攻 affil-num=5 en-affil= kn-affil=岡山大学大学院自然科学研究科機能分子化学専攻 affil-num=6 en-affil= kn-affil=岡山大学大学院自然科学研究科機能分子化学専攻 en-keyword=automated collection/concentration kn-keyword=automated collection/concentration en-keyword=chelating disk and chelating resin kn-keyword=chelating disk and chelating resin en-keyword=ICP-AES kn-keyword=ICP-AES en-keyword=heavy metals kn-keyword=heavy metals END