应用悬汞电极阳极溶出法测定高纯材料中数量级为10~(-4)—10~(-7)％微量杂质(或更低含量),在1956年以后才被应用于分析化学中。本文利用悬汞电极阳极溶出法直接测定高纯铝中微量锌、镉、铅、铜,灵敏度分别为:锌:3×10~(-5)％,镉:2×10~(-6)％,铅:2×10~(-6)％,铜:3×10~(-5)％。 (一)仪器 The determination of trace impurities (or lower) in the ultrapure materials of the order of 10 ~ (-4) -10 ~ (-7)% by hanging mercury electrode anodic dissolution method was applied to analytical chemistry after 1956. In this paper, the direct determination of trace amounts of zinc, cadmium, lead and copper in high purity aluminum by hanging mercury electrode anodic stripping method were: zinc: 3 × 10 -5%, cadmium: 2 × 10 -6% , Lead: 2 × 10 ~ (-6)%, copper: 3 × 10 ~ (-5)%. (A) equipment