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前言 铜合金中铅和锌的分析由于大量铜的存在及其他元素的干扰,使其测定遇到了困难。长期以来,曾提出不少的预分离方法,然后进行容量法或极谱法测定。但是,分离的操作,多属繁杂费时,难于满足生产上的要求。因此,迄今仍有生产部门沿用以氰化钾为掩蔽剂的络合液定法。但使用大量的氰化钾,往往造成生产上的许多麻烦。 新近,为了改善工作条件,消除环境污染,曾有铜合金中主要成份的无氰分析新系统的报导,在新的掩蔽剂应用上取得了良好的效果,使无氰络合滴定的实际应
Preface Determination of lead and zinc in copper alloys Due to the presence of large amounts of copper and the interference of other elements, the determination of lead and zinc has encountered difficulties. For a long time, many pre-separation methods have been proposed, followed by volumetric or polarographic determination. However, the separation operation is complicated and time-consuming, making it difficult to meet production requirements. Therefore, so far there are still production departments follow the complexing solution with potassium cyanide masking agent. However, the use of large amounts of potassium cyanide often causes many troubles in production. Recently, in order to improve working conditions and eliminate environmental pollution, a new system for cyanide-free analysis of major components in copper alloys has been reported, and good results have been obtained in the application of new masking agents, so that the actual reaction of cyanide-free complexation titration