DETERMINATION OF CRITICAL MICELLE CONCENTRATIONS BY BIPOLAR PULSE CONDUCTANCE

被引：28

作者：

BAXTERHAMMOND, J ^{[1
]}

POWLEY, CR ^{[1
]}

COOK, KD ^{[1
]}

NIEMAN, TA ^{[1
]}

机构：

[1] UNIV ILLINOIS,SCH CHEM SCI,URBANA,IL 61801

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1980年 / 76卷 / 02期

关键词：

Sulfur compounds - Sodium dodecyl sulfate - Chlorine compounds - Micelles;

D O I：

10.1016/0021-9797(80)90384-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A microcomputer-controlled bipolar pulse conductance (BICON) instrument was applied to the conductometric measurement of critical micelle concentrations (CMC). The BICON method provides short conductance measurement times (30 μsec), wide dynamic range (10-1 to 10-8 Ω-1) and freedom from charging effects and bridge balancing. Surfactants studied were cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS), and benzyl-dimethylhexadecylammonium chloride (BDHA). CMC values determined at 23.7oC were: CTAB (9.4 ± 0.54) × 10-4M; SDS (8.5 ± 0.58) × 10-3 M; and BDHA (4.7 - 0.31) × 10-4M. The high-speed measurement time of the BICON instrument coupled with observed short dilution equilibration times enabled a simple and rapid conductometric dilution titration to be used in the determination of the CMC value for CTAB. © 1980 by Academic Press, Inc.

引用

页码：434 / 438

页数：5

共 17 条

[1] SURFACTANT-SELECTIVE ELECTRODES .1. IMPROVED LIQUID ION-EXCHANGER [J].