本文提出了硒-高碘酸钾催化极谱法测定痕量硒的适宜底液,给出了简单、快速而准确地测定0.000X—0.00000X％硒的分析方法。对硒-高碘酸钾催化波的机理作了初步探讨,指出此催化波的性质可能是由于SeSO_3~2-吸附在汞滴表面上改变了滴汞电极的性质,使IO_4~-提前还原而产生了很大的催化电流。 This paper presents a suitable selenium-potassium periodate catalytic polarographic determination of trace selenium suitable bottom liquid, gives a simple, rapid and accurate determination of 0.000X-0.00000X% selenium analysis. The mechanism of catalytic wave of selenium-potassium periodate was discussed preliminarily. It is pointed out that the nature of this catalytic wave may be due to the fact that the adsorption of SeSO_3 ~ 2- on the surface of the mercury drop changed the properties of the droplet mercury electrode and caused the premature reduction of IO_4 ~ Produced a large catalytic current.