饱和卤水中大量Li~＋存在对K~＋和Mg^（2＋）分析结果的影响

The Influence of large quantity Lithium ion on the analytical result of Potassium and Magnesium ions in saturated brine

含锂海水体系中由于Ｌｉ＋的介入使得Ｋ＋、Ｍｇ２＋的分析结果受到一定程度的影响．本实验针对这个问题进行了一系列的条件实验，证明大量Ｌｉ＋存在对Ｋ＋的分析结果没有影响．而对Ｍｇ２＋的分析影响较大．此种情况下对Ｍｇ２＋的分析采用正丁醇－乙醇混合液掩蔽法和二次沉淀法分析，此法的相对误差不超过０．５％。

It was experimentally proved that the influence of lithium ion on the KB (C6H5) 4 gravimetric analysis of potassium ion is negligible and the influence of the interference of lithium on magnesium complex titration is obvious. By adding a mixture solution of n-butyl alcohol and ethanal (1: 10) or reprecipitating to eliminate the influence.The error of analytical results is less than 0. 5%.