start-ver=1.4 cd-journal=joma no-vol=22 cd-vols= no-issue=1 article-no= start-page=161 end-page=164 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=20060224 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Speciation of chromium in seawater by ICP-AES with dual mini-columns containing chelating resin en-subtitle= kn-subtitle= en-abstract= kn-abstract=

A method for the preconcentration and speciation of chromium in seawater was developed. On-line preconcentration and determination were carried out by using inductively coupled plasma atomic emission spectrometry (ICP-AES) with dual mini-columns containing a chelating resin. In this system, Cr(III) was collected on the first column. The effluent containing residual chromium from the first column was collected on the second column after passing through a reduction-switching unit, in which the reducing agent was introduced, or not, for the reduction of Cr(VI) to Cr(Ill). Cr(VI) was determined as the difference between the concentration of pre-reduced Cr(VI) and Cr(III) in the effluent from the first column. The detection limits for Cr(III) and Cr(VI) were 0.04 and 0.09 mu g l(-1), respectively.

en-copyright= kn-copyright= en-aut-name=SumidaTakashi en-aut-sei=Sumida en-aut-mei=Takashi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=SabarudinAkhmad en-aut-sei=Sabarudin en-aut-mei=Akhmad 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=Kochi Prefectual Industrial Technology Center 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=ONLINE PRECONCENTRATION kn-keyword=ONLINE PRECONCENTRATION en-keyword=SPECTROMETRY kn-keyword=SPECTROMETRY END