催化动力学光度法测定食盐中碘含量

Study on Catalytic Dynamics Photometric method to Assay I_2 Content in Salt

基于碘（Ⅰ ）在高碘酸钾氧化亮绿ＳＦ增色反应中的催化活性，建立了高灵敏度、高选择性的催化动力学光度法测定食盐中碘含量的新方法，测定线性范围为０．５～１２．５μｇ／２５ｍｌ，方法检出限为２．９×１０－１μｇ／ｍｌ。该方法重现性好、准确度高、操作简便、快捷，测定结果令人满意。

This paper was based on the catalytic activity of I- in color increasing reaction in which KIO4 oxidiaed in briｇht green (sf),so as to establishe a new ,high sensitive and high selective method of assaying I2 content in salt by catalytic dynamics photometric method.Linear assaying range was 0.5～12.5μg/25ml and measuring limit was 2.9×10-1μg/ml.Repetition of this method was fine accurate and operation simpler and process prompt.The satisfactory effects were obtained.