一、前言铜合金中Cu、Sn、Pb、Zn过去一般都是把重量法和容量法结合使用的方法来分析,但分析时间过长,一般需2小时左右,有时甚至长达十几小时。同时还需有贵重仪器—电解器和铂金电极等。由于时间长,不能满足生产要求。随着络合分析法应用的推广,上述四种元素一般均以容量络合法进行分析,但在分析中要用烈性毒药——氰化钾,并且要秤取两个试样才 I. Introduction Cu, Sn, Pb and Zn in copper alloys used to be analyzed by the combination of gravimetric method and volumetric method. However, the analysis time is too long and generally takes about 2 hours and sometimes up to ten hours. Also need to have valuable equipment - electrolyzer and platinum electrodes. Due to a long time, can not meet the production requirements. With the promotion of the application of complex analysis, the above four elements are generally analyzed by the capacity complexation method, but in the analysis to use the virulent poison - potassium cyanide, and to weigh the two samples