微量氯酸根的间接光度测定

Indirect Determination of Trace Chloranion by Spectrophotometry

本文基于在酸性介质中，过量的Ｆｅ（Ⅱ）可定量还原氯酸根，剩余的Ｆｅ（Ⅱ）可与邻菲啉络合形成桔红色螯合物这一现象，建立了间接光度法测定微量氯酸根的新方法．该法的线性范围为０─１８０μｇ／２５ｍｌＣｌＯ３－．方法简便、快速，并已用于氯化钾试剂和氯酸盐半成品中氯酸根的测定，结果令人满意．

In this paper.an indirect spectrophotometric method for determination of trace chloranion has been reported.In acid meditum,excess iron(Ⅱ) can reduction chloranion,and the unreaction iron(Ⅱ) is coloring by o-phenanthroline.The linear range is 0-18.0μg/25ml of ClO3-.This method is simple.rapid and has been used to determine of ClO3- in potassium chloride and chlorate semiproduct with satisfactory results.