在电解质溶液中测定非电解质溶解度的新方法

A New Method for the Determination of the Solubilities of Non-Electrolytes in Aqueous Electrolyte Solutions

提出了一种可以同时测定电解质溶液中非电解质的溶解度和饱和溶液水活度的新方法。该法把等压平衡与传统化学分析统一起来 ,其优点是 :( 1 )将多元饱和溶液中非电解质溶解度的测定转变为共存离子的浓度测定 ,避开了对非电解质难于进行精确化学分析的难题 ;( 2 )可以同时确定所测饱和体系的水活度。用该法测定了Na Cl和 KCl溶液中甘露醇的溶解度并与文献值进行了比较 。

A new method for the determination of solubilities of non electrolytes in aqueous electrolyte solutions has been presented. This method combines the isopiestic equilibrations and conventional chemical analysis at isopiestic equilibrium. Some advantages of this method are: (1) Transforms precise chemical analysis at equilibrium from non electrolytes to coexisting ions; (2) Solvent activities can be simultaneously determined for the saturated solutions within the same experiment. By using this method, solubilities of mannitol in sodium chloride solutions and potassium chloride solutions have been measured and found to be in good agreement with the data reported in some literatures.