改善EDTA测定糖汁钙镁盐滴定终点的研究

The research on improving of ascertaining the end point of EDTA measuring sait Ca and Mg in sugar juice

由于糖汁中复杂成分的干扰 ,致使传统的糖汁钙镁盐含量测定方法存在着测定终点难以准确判断 ,结果准确度和精确度不高的缺点。因此本实验研究了用CMP混合指标剂测定钙和K -B混合指标剂测定钙镁总量。结果表明 ,使用这两种混合指标剂能使滴定绺明显改善 。

As far as the conventional measure of determinating the conternt of salt Ca and Mg (named EDTA method) is concerned, it is hard to ascertain the end point because of the CMP miced indicator and K-B mixed indicator on the determining content of Salt Ca and Mg in sugar juice. The result shows that applying those two indicators can greatly improve the degree of accuracy of the results. it is more ease to ascertain the end point.