碘化铵-碲-硫酸底液中催化极谱法测定砷,灵敏度可达0.0023μg ml~(-1)(3×10~(-8)M)。比DDC-Ag法约灵敏400余倍,是目前测砷最灵敏的方法之一。已应用于矿石,人发,水中。但其催化波的性质及机理尚不清楚,本文着重通过系列的试验,推测其可能反应为: Determination of arsenic by catalytic polarography with ammonium iodide - tellurium - sulfuric acid at the bottom of the column. The sensitivity was 0.0023 μg ml -1 (3 × 10 -8 M). About 400 times more sensitive than the DDC-Ag method, is one of the most sensitive methods for measuring arsenic. Has been used in ores, human hair, water. However, the nature and mechanism of its catalytic wave is not clear, this article focuses on a series of experiments, suggesting that its possible reaction is: