梁永武, 贾殿赠, 安兴民. 工业电镀废液中总铬量快速测定的新方法[J]. Journal of Xinjiang University (Natural Science Edition in Chinese and English), 1985, (2).DOI:
工业电镀废液中总铬量快速测定的新方法
摘要
铬是较易被锌木齐还原为二价离子的过渡元素。早在二十年代
亚铬溶液就被用来连续滴定数种金属离子和一些酸根阴离子
以及一些有机化合物
如氯酸根和硝基化合物。铬的测定
一般都是将低价铬氧化为高价铬
再进行测定
而还原铬为低价铬
再进行测定的工作还未见报道。根据亚铬离子容易制备和容易被氧化还原滴定的特点
本文
Abstract
In the present investigation
we have developed a new method for determing the total chromium in the waste electroplating solution. The method use a solid zine- mercurate colunm as a reducing unit. The colunm reduces the Cr6+ and Cr3+ ion in the waste electroplating solution to Cr2+
then the Cr2+ ion can be titrated by standard FeCl3 solution. The method is simpler and rapider than those classic methods. The new method can be used in the laboratory of factory.