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碘酸钾是一种广泛用于加碘食品、营养品和补碘制剂的微量有效成分、文章介绍了一种灵敏、快速测定微量碘酸钾的分析方法。在由淀粉试液和适量硫酸组成的混合介质中，碘酸钾与碘化钾反应．使溶液颜色变蓝，然后在570nm处测定其吸光度。与吸光度呈线性的碘酸钾浓度范围为（0．2～2．4）μg／ml（r＝0．9996），检测下限为0．1μg／ml，摩尔吸光系数为6．69×104、该法用于三种药物中碘酸钾分析，结果满意。
Potassium iodate is a trace active ingredient which is widely used in iodized food, nutrition and iodine supplement preparation. A sensitive and rapid method for the determination of trace potassium iodate is introduced in this paper. In a mixed medium consisting of a starch test solution and an appropriate amount of sulfuric acid, potassium iodate is reacted with potassium iodide. The solution color turns blue, and its absorbance is measured at 570 nm. The concentration of potassium iodate which is linear with the absorbance ranged from 0.2 to 2.4 μg / ml (r = 0.9996). The detection limit was 0.1 μg / ml, the molar absorptivity was 6.69 × 104, The method is used in three drugs potassium iodate analysis, the results are satisfactory.