在许多种铜合金中往往含有微量的锑。其中锑的测定主要是采用SbCl_6~-与碱性染料甲基紫,结晶紫,罗丹明B等缔合成三元络合物,以苯、甲苯等有机溶剂萃取的分光光度法。这些方法灵敏度较高(例如SbCl_6~-甲基紫法的摩尔吸光系数为1.1×10~5),选择性较好,有一定的实用价值。但是,它们的共同缺点是需要用有机溶剂进行萃取,有臭味和毒性,操作繁琐,使其应用受到很大的限制。 Many kinds of copper alloys often contain traces of antimony. The determination of antimony is mainly the use of SbCl_6 ~ - basic dyes methyl violet, crystal violet, rhodamine B and other associated triple ternary complex, with benzene, toluene and other organic solvents extraction spectrophotometry. The sensitivity of these methods is high (for example, the molar absorption coefficient of SbCl_6 ~ - methyl violet method is 1.1 × 10 ~ 5), which has good selectivity and practical value. However, their common disadvantage is the need to extract with organic solvents, odor and toxicity, cumbersome operation, its application is greatly restricted.