Determination of cationic surfactants in water samples by their enhanced resonance light scattering with azoviolet

被引：43

作者：

Yang, CX ^{[1
]}

Li, YF ^{[1
]}

Huang, CZ ^{[1
]}

机构：

[1] SW Normal Univ, Coll Chem & Chem Engn, Inst Environm Chem, Chongqing 400715, Peoples R China

来源：

ANALYTICAL AND BIOANALYTICAL CHEMISTRY | 2002年 / 374卷 / 05期

基金：

中国国家自然科学基金;

关键词：

resonance light scattering (RLS); cationic surfactants; azoviolet (AV); zephiramine (Zeph); cetyl trimethyl ammonium bromide (CTMAB);

D O I：

10.1007/s00216-002-1527-0

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A simple assay of cationic surfactants in water samples was developed based on the measurements of enhanced resonance light scattering (RLS). At pH 6.09 and ionic strength 0.03 M, the interactions of azoviolet (AV) with cationic surfactants, including zephiramine (Zeph) and cetyl trimethyl ammonium bromide (CTMAB), result in enhanced RLS signals characterized by the peaks of 470.0, 485.0 and 495.0 nm. The enhanced RLS intensity is proportional to the concentration of cationic surfactant of Zeph in the range of 0.2similar to6.0x10(-6) M, and to that of CTMAB in the range of 0.4similar to4.8x10(-6) M. The limit of determination (3sigma) is 2.1x10(-8) M and 3.8x10(-8) M for the two surfactants, respectively. Determinations of cationic surfactants in synthetic and tap water samples were successfully made with a recovery of 90.5similar to108.6%.

引用

页码：868 / 872

页数：5

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