FLOW-INJECTION SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF ANIONIC SURFACTANTS WITH AN ANIONIC AZO DYE AND A QUATERNARY AMMONIUM ION

被引：3

作者：

Motomizu, Shoji ^{[1
]}

Oshima, Mitsuko ^{[1
]}

Gao, Yun-Hua ^{[1
]}

机构：

[1] Okayama Univ, Fac Sci, Dept Chem, Okayama 700, Japan

来源：

ANALYTICAL SCIENCES | 1991年 / 7卷

关键词：

anionic surfactants; methyl orange analogues; flow injection method;

D O I：

10.2116/analsci.7.Supple_301

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The behavior of color development of anionic azo dyes, Methyl Orange and its analogues, was examined in aqueous media by changing the micro-environment of the dyes. Organic onium ions brought about a decrease in the absorbance at wavelengths near 480 nm (pH 6.5) and 500nm (pH 2) and an increase in the absorbance at wavelengths near 400nm. On the basis of this color change phenomenon, the spectrophotometric method for the determination of anionic surfactants was developed. Anionic surfactants (AS-) react with quaternary ammonium ion to form stable ion associates (Q center dot AS) and the residual amount of Q- was determined with an azo dye by measuring the absorbance at about 400nm or 500nm. This spectrophotometric method was applied to the flow injection technique.

引用

页码：301 / 304

页数：4