After dissolving ore samples of zinc and lead, the lead ions were precipitated.The zinc ions were titrated by EDTA.The lead precipitation was then dissolved.

• 利用铅锌矿中铅生成复盐沉淀,用EDTA标准溶液滴定锌,然后溶解复盐沉淀,加入过量EDTA标准溶液,用硝酸铅标准溶液反滴定。