碘滴定法测定铜的改进

Improvement on the determination of copper by iodimetry

在微酸性溶液中 ,以六偏磷酸钠取代氟化物作掩蔽剂 ,改用少量KI进行碘滴定法测定铜。方法可测定 0 5 %以上的铜 ,RSD小于 0 18%。

In the solution of weak acid,using sodium hexametaphosphorate in stead of fluoride as a masking agent and using a smaller amount of KI,the method for the determination of copper by iodimetry was improved,The content of copper(>0 5%)could be determined by the proposed method with RSD<0 18%