EDTA 法测定氯氧铋中铋的研究

摘要

Determination conditions , disturbance and elimination methods , rate of recovery precipitation recovery and so on for determination of bismuth in the bismuth oxychloride concentrates by EDTA method were studied.By using thiourea as indicator , the determination method of bismuth in the bismuth oxychloride concentrates was established .This method was good applicability , simple operation , and with high accuracy.%氯氧铋作为回收金属粗铋的中间产物，其品位的高低直接影响着后面火法熔炼所产出粗铋的品位。在大量氯氧铋中铋含量的测定实践基础上，讨论了提高EDTA法测定氯氧铋中铋含量的准确度的方法。通过EDTA法测定氯氧铋精矿中铋的测定条件、干扰及消除、回收率等系统试验，拟定了以硫脲为指示剂测定铋的分析方法，该法适用性好，操作简便、准确度高，适用于中高含量铋的测定。