硒对苦味酸氧化硫离子的反应有催化作用，本文采用通用硫离子选择性电极检测硫离子浓度的变化速率，进行硒的催化动力学测定，硒的测定范围为０．１～２．０ｍｇ·Ｌ￣（－１），硒浓度在ｌｍｇ·Ｌ￣（－１）时测定的变异系数为２．７％，此法方便、快速，用于阳极泥中硒含量的测定，回收率为９４％～１０４％。 Selenium catalyzes the reaction of picric acid with sulfur oxide ions. In this paper, the change rate of sulfur ion concentration was measured by a general-purpose sulfur-ion selective electrode, and the catalytic kinetics of selenium was determined. The determination range of selenium was 0.1-2.0mg · L ~ (-1). The coefficient of variation (CV) measured at 1 mg · L ~ (-1) of selenium concentration was 2.7%. The method was simple and rapid and was applied to the determination of selenium in anode slime. The recovery was 94% ~ 104%.