介绍一种锌和锌合金中微量镉的萃取光度测定法。大量锌采用强碱掩蔽,铜的干扰可通过选择性溶样而消除。方法应用于多种样品测定,结果满意。 A method for the determination of trace cadmium in zinc and zinc alloys by extraction spectrophotometry is described. Large amounts of zinc are masked with a strong base and copper interference can be eliminated by selective sample dissolution. The method is applied to a variety of sample determination, the results are satisfactory.