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用示波极谱法测定铜精矿中的铅,由于铜的含量为铅含量的10倍以上铜对铅的干扰非常严重,我们要用此方法测定铅的含量那就必须找一种试剂消除铜对铅的干扰,本法就是加入硫氰酸钾,在测定的溶液中铜离子与硫氰根发生反应生成硫氰化铜,但由于硫氰化铜不稳定,溶液中又存在还原性物质所以生成白色的硫氰化亚铜这样消除了铜对铅的干扰。通过试验证明此方法可以得到铅准确的结果,且此方法快速,简单易于操作掌握。
Determination of lead in copper concentrate by oscillopolarographic method, copper content of more than 10 times the lead content of copper interference on the lead is very serious, we use this method to determine the content of lead, we must find a reagent to eliminate Copper interference of lead, the law is to join the potassium thiocyanate, the determination of the solution of copper ions and thiocyanate reaction of thiocyanate copper, but due to the instability of copper thiocyanate, the solution and the presence of reducing substances Therefore, the formation of white copper thiocyanate so eliminate the interference of copper on the lead. It is proved by experiment that this method can get the accurate result of lead, and this method is fast, simple and easy to operate and master.