New procedure for determining the solubility of lypophilic nonionlic surfactants in water

被引：9
|
作者：
Zadymova, NM [1 ]
Karmasheva, NV [1 ]
Poteshnova, MV [1 ]
Tsikurina, NN [1 ]
机构：
[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia
来源：
COLLOID JOURNAL | 2002年 / 64卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1023/A:1016803616982
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：
The procedure that allows to study the kinetics of a dissolution of oleophilic nonionic surfactants in water and to determine the equilibrium values of solubility (S-w(eq)) was proposed, based on the spectrophotometry of extremely dilute, finely dispersed o/w emulsions of these substances prepared by sonication. The equilibrium values of solubility of tetraethoxylated p-nonylphenol (Neonol AF(9-4)) and sorbitan monolaurate (Span-20) at 293 K in water are 3.67x10(-5) and 1.03x10(-5) M, respectively. For the tetraethoxylated p-nonylphenol, the equilibrium value of solubility in water determined by the proposed procedure agrees well with that determined by precision tensiometric measurements.
引用
收藏
页码：400 / 405
页数：6
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