铅基轴承合金中铅的快速测定以EDTA络量法为宜。一般使铅成硫酸铅沉淀分离,或不经分离加入隐蔽剂和辅助络合剂后直接滴定。以往分析时常使用剧毒氰化物作隐蔽剂。我们参考了有关文献,采用在微酸性溶液中,以酒石酸、硫脲、邻菲罗啉联合掩蔽锡、铜以及少量镍、锌、镉、 Lead-bearing alloy in the rapid determination of lead by EDTA volume method is appropriate. The lead is generally precipitated as lead sulfate precipitation, or without adding a concealment agent and auxiliary complexing agent directly after titration. In the past analysis often use toxic cyanide as a concealment agent. We refer to the literature, in a slightly acidic solution, with tartaric acid, thiourea, o-phenanthroline joint masking tin, copper and a small amount of nickel, zinc, cadmium,