高纯铝中ppm级镉、铅、铜杂质的测定,现普遍采用悬汞电极或铂球镀银沾汞电极阳极溶出法测定。本文利用玻碳电极导电性好,灵敏度高和氢的超电势高等优点,与阳极溶出法连用,解决了在一般试验室中可靠的测定高纯铝中ppb级镉、铅、铜杂质的问题。试验证明方法的灵敏度,镉为3.6×10~(-9)M, Determination of high-purity aluminum ppm-level cadmium, lead, copper impurities are commonly used hanging mercury electrode or platinum silver ball mercury electrode anodic dissolution method. In this paper, the use of glassy carbon electrode conductivity, high sensitivity and hydrogen overpotential advantages, combined with the anodic stripping method, solves the problem of reliable determination of ppb cadmium, lead and copper impurities in high purity aluminum in general laboratory. The sensitivity of the method is proved by experiment, the cadmium is 3.6 × 10 ~ (-9) M,