start-ver=1.4
cd-journal=joma
no-vol=3
cd-vols=
no-issue=3
article-no=
start-page=265
end-page=269
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1987
dt-pub=19870610
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Spectrophotometric Determination of Anionic Surfactants in River Water with Cationic AZO Dye by Solvent Extraction- Flow Injection Analysis
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Anionic surfactants in water were determined by a spectrophotometric flow injection technique coupled with solvent extraction. The ion associate which formed between an anionic surfactant and an cationic azo dye was extracted into an organic solvent and the absorbance was measured. The carrier was distilled water, and the reagent solution contained an cationic azo dye and sodium sulfate, the pH of which being adjusted to 5 with acetate buffer. A phase separator with a poly(tetrafluoroethylene) porous membrane (0.8ƒÊm pore size) was used to separate the organic phase. Six derivatives of cationic azo dyes and several extracting solvents were examined; a pair of 1-methyl-4-(4-diethylaminophenylazo)- pyridinium cation and chloroform turned out best. The sampling rate was 30 samples per hour. Calibration graphs were linear up to 2�~10(-6)M or 3�~10(-5)M of anionic surfactant when injection volume was 300 or 100ƒÊl, respectively. The relative standard deviation(n=10) was 1.5% for 300ƒÊl of 1�~10(-6)M sodium dodecylsulfate. The detection limit was as little as 1�~10(-8)M of anionic surfactant. Anionic surfactants in river water were determined satisfactorily.
en-copyright=
kn-copyright=

en-aut-name=MotomizuShoji
en-aut-sei=Motomizu
en-aut-mei=Shoji
kn-aut-name=–{�…�¹“ñ
kn-aut-sei=–{�…
kn-aut-mei=�¹“ñ
aut-affil-num=1
ORCID=

en-aut-name=HazakiYoshito
en-aut-sei=Hazaki
en-aut-mei=Yoshito
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=‘哇ŒõŽq
kn-aut-sei=‘哇
kn-aut-mei=ŒõŽq
aut-affil-num=3
ORCID=

en-aut-name=ToeiKyoji
en-aut-sei=Toei
en-aut-mei=Kyoji
kn-aut-name=‹Ë‰h‹±“ñ
kn-aut-sei=‹Ë‰h
kn-aut-mei=ܱҖ
aut-affil-num=4
ORCID=

affil-num=1
en-affil=
kn-affil=‰ªŽR‘åŠw

affil-num=2
en-affil=
kn-affil=‰ªŽR‘åŠw

affil-num=3
en-affil=
kn-affil=‰ªŽR‘åŠw

affil-num=4
en-affil=
kn-affil=‰ªŽR‘åŠw
en-keyword=Anionic surfactant determination
kn-keyword=Anionic surfactant determination
en-keyword=cationic azo dye
kn-keyword=cationic azo dye
en-keyword=ion associate extraction
kn-keyword=ion associate extraction
en-keyword=spectrophotometry
kn-keyword=spectrophotometry
en-keyword=flow injection analysis
kn-keyword=flow injection analysis
END