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ID 19982
Eprint ID
19982
FullText URL
Author
Motomizu, Shoji
Hazaki, Yoshito
Oshima, Mitsuko
Toei, Kyoji
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 (0.8μm 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 100μl, respectively. The relative standard deviation(n=10) was 1.5% for 300μl 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.
Keywords
Anionic surfactant determination
cationic azo dye
ion associate extraction
spectrophotometry
flow injection analysis
Published Date
1987-06-10
Publication Title
Analytical Sciences
Volume
volume3
Issue
issue3
Publisher
日本分析化学会
Publisher Alternative
Japan Society for Analytical Chemistry
Start Page
265
End Page
269
ISSN
0910-6340
NCID
AA10500785
Content Type
Journal Article
language
英語
Copyright Holders
日本分析化学会
File Version
publisher
Refereed
True
DOI