Measurement and control of water content of organic solvents
Measurement and control of water content of organic solvents
复制标题
有机溶剂含水量的测量与控制
DOI：
10.1021/ac00298a065
复制
发表时间：
1986
影响因子：
7.4
通讯作者：
P. Tobback
中科院分区：
文献类型：
--
作者：
H. L. Goderis;B. L. Fouwe;S. Cauwenbergh;P. Tobback
描述了一种同位素稀释方法，用于定量测定水在有机溶剂中的溶解度，该溶解度是样品平衡时相对湿度的函数。/sup 3/H/sub 2/O用作示踪剂，相对湿度条件通过在具有已知水活度的饱和盐溶液上方温育有机溶剂来实现。该技术的适用性与存在的水的浓度范围无关，水分的最小量仅受所使用的氚标记物的浓度限制。水在烃类溶剂如正己烷中的溶解度等温线呈S形，反映了在曲线的较高相对湿度部分水分子溶解的协同效应。溶解度随温度升高而增加。
An isotopic dilution procedure is described for the quantitative determination of the solubility of water in organic solvents as a function of the relative humidity at which the sample is equilibrated. /sup 3/H/sub 2/O is used as a tracer, and the relative humidity conditions are realized by incubation of the organic solvent above a saturated salt solution having a known water activity. The technique is applicable independent of the concentration range of water present, the minimum amount of moisture being only limited by the concentration of the tritium label used. Solubility isotherms of water in hydrocarbon solvents such as n-hexane are sigmoidal in shape, reflecting cooperative effects in the solubilization of water molecules at the higher relative humidity portion of the curve. Solubility increases with increasing temperature.