茶叶中钴的测定与含量研究

THE DETERMINATION OF THE COBALT AND THE RESEARCH OF THE CONTENT IN TEA

钴在丁二酮肟—盐酸羟胺—亚硝酸納体系中(PH=7.8)有—灵敏的极谱催化波,峰电位为—1.28V(Vs.SCE),检测下限为0.016ppb,线性范围为0.016—0.24ppb,可准确用于定量测定。

The Cobalt have a rather sensitive polarographic catalytic wave in the svstem of dimethylglyoxime-hydroxylammonium chloride-sodium nitrite solution at pH 7. 8. The peak potential appears at-1,28V (Vs SCE) Thedetection limit is 0.016 ppb. These is a linear relationship in the range of 0.016-0.24 ppb. It in accurate to be used for quantitative determination