在 pH 10以 EBT 为指示剂采用破蔽法络合滴定测锌是目前铜合金中测锌的通用方法之一。其中主要掩蔽剂为氰化钾。氰化物虽然有良好的掩蔽能力,但有剧毒。另外在分析过程中我们尚有如下体会:1.对操作人员身体健康有害,特别在成批分析后,化验人员都有头昏不适之感觉。2.此法关键是要滴定得快、甲醛不能过多、pH 要合适、温度不宜过高等,故对操作要求比较严格,特别天热时终点不易控制。3.样品 One of the common methods to measure zinc in copper alloys is to measure zinc by complexing titration with EBT as indicator at pH 10. Among them, the main masking agent is potassium cyanide. Although cyanide has good masking ability, it is highly toxic. In addition, we have the following experience during the analysis: 1. To the health of operators is harmful, especially after batch analysis, laboratory staff have the feeling of dizziness. 2. This method is the key to titrate fast, formaldehyde can not be too much, pH to be appropriate, the temperature should not be too high, so the operation is more stringent requirements, especially the end of the day is not easy to control heat. 3 samples