水样及生物体内微量锌、锰、硒的极谱催化波同时测定

Simultaneous determination of trace Zinc, Manganese and Selenium by catalytic polarography

本文提出了在酒石酸盐-乙二胺-高氯酸-亚硫酸钠-高碘酸钾-EDTA体系中同时测定微量锌、锰、硒的极谱催化波，波峰敏锐，波形稳定。Zn2+浓度在0．4～40μg／dm3，Mn2+浓度在1．6～80μg／dm3，Se（Ⅳ）浓度在0．02～3．0μg／dm3范围内浓度与峰电流呈线性关系。取天然水样平行12份测定，变异系数在10％以内。

Simultaneous determination of the catalytic polarographic wave of Zinc,Manganese,and Selenium in tartrade-diaminoethane-perchloric acid-Sodium Sulphite-polassium periodidateEDTA system is given. The waves are sharp,and the wave shapes stable. When the concentration ranges within 0. 4 ~ 40μg/dm3 Zn2+, 1. 6~80μg/dm3 Mn2+ and 0.02~3.0μg/dm3 Se (Ⅳ),the concentrations are linear with the peak current. The coefficients of variation are within 10%。