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本文研究了阳极溶出伏安法测定高纯铝高纯镁中的铜、铅、镉、锌。在丹麦P04型极谱仪上配用铂球镀银汞膜电极,在pH=2.5～3.5,0.5克铝(镁)/25毫升的溶液中,可直接连续测定铜、铅、镉、锌四元素,选择预电解富集电位为-1.50伏,检出下限分别为,铜:1×10~(-5)%;铅:5×10~(-6)%;镉5×10~(-6)%;锌:1×10~(-5)%。本法已经被应用于高纯铝高纯镁中痕量铜、铅、镉、锌的测定,并取得了良好的效果。
In this paper, anodic stripping voltammetry for the determination of copper, lead, cadmium and zinc in high purity aluminum high purity magnesium. In the Danish P04-type polarography instrument equipped with platinum ball silver-plated mercury electrode, pH = 2.5 ~ 3.5,0.5 grams of aluminum (magnesium) / 25 ml of solution can be directly continuous determination of copper, lead, cadmium, zinc four Element, select the pre-electrolysis enrichment potential of -1.50 volts, the detection limits were: copper: 1 × 10 -5%; lead: 5 × 10 -6%; cadmium 5 × 10 ~ (- 6)%; zinc: 1 × 10 ~ (-5)%. This method has been applied to the determination of trace amounts of copper, lead, cadmium and zinc in high pure aluminum with high purity magnesium and achieved good results.