摘要
在弱酸性溶液中邻菲咯啉与镉（Ⅱ）形成无色可溶性配合物，其稳定性高于相对应的乙二胺四乙酸（ＥＤＴＡ）配合物，在镉（Ⅱ）的ＥＤＴＡ配合物溶液中加入掩蔽剂邻菲咯啉，则配合物分解。通过铅（Ⅱ）标准溶液滴定释放出的
Phen with Cadmium (Ⅱ)can make a kind of soluble complex compound in acid solution. It's steady is higher than EDTA.When 1,10-phen was added as masking agent, complex can free EDTA. Using Pb(NO3)2can titrate EDTA to know the con centration of cadmium(Ⅱ).The method is simply and has a good re- sult,which has a good end It's result can satisfied everyone.
