INTERACTION BETWEEN SULPHONEPHTHALEIN DYES AND QUATERNARY AMMONIUM-IONS IN AQUEOUS-SOLUTION

被引：15
|
作者：
YAMAMOTO, K
机构：
[1] Department of Industrial Chemistry, Yonago National College of Technology, Hikonacho, Yonago
来源：
ANALYTICAL SCIENCES | 1992年 / 8卷 / 03期
关键词：
SULPHONEPHTHALEIN DYES; QUATERNARY AMMONIUM SURFACTANTS; SPECTRAL CHANGE; ION ASSOCIATION;
D O I：
10.2116/analsci.8.299
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The effect of cationic surfactants at concentrations below their critical micelle concentrations on the absorption spectra of the sulphonephthalein dyes was studied. The addition of a cationic surfactant to a Bromocresol Purple (BCP) solution buffered at about pH 8 resulted in a large spectral change: the color changed from blue to light-yellow. The mechanism of this color-change reaction is based on ion association of the quaternary ammonium cation with the monovalent dye anion(HBCP-) produced by the addition of a proton to BCP2- and the formation of a precipitate accompanied by ion association.
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页码：299 / 305
页数：7
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