普通极谱法测定高纯银中微量的镉,灵敏度不很高,往往达不到满意的结果。已有资料报导,导数脉冲极谱法测定镉的灵敏度可达1×10~(-8)M。我们使用国产JP-M1型脉冲极谱仪,用导数脉冲极谱法测定了高纯银中微量镉。本方法灵敏度高,准确,操作简单,快速;测定范围在2×10~(-7) Ordinary polarographic determination of trace amounts of high-purity silver cadmium, the sensitivity is not high, often not satisfied with the results. It has been reported that the sensitivity of derivative pulse polarographic determination of cadmium up to 1 × 10 ~ (-8) M. We use the domestic JP-M1 pulse polarography, and the determination of trace cadmium in high purity silver by using the derivative pulse polarography. The method has the advantages of high sensitivity, accurateness, simple and fast operation, and the determination range is 2 × 10 -7