碘盐中碘离子的分光光度测定法  

Spectrometry in the Determination of Iodine Ion in Iodided Sodium Chloride

作　　者：刘晓辉[1] 陈光慈[1] 徐清[1] 

机构地区：[1]陕西省西安市疾病预防控制中心,710054

出　　处：《职业与健康》2006年第17期1350-1352,共3页Occupation and Health

摘　　要：目的寻找一种测定碘盐中碘离子的简单快速的方法。方法碘盐中的碘酸根在磷酸酸性溶液中氧化碘化钾析出碘，碘与过量碘化钾形成I3^-，用723型分光光度计在351ml波长下进行测定。结果方法的线性范围0～60mg／kg，最低检出浓度为0．01mg／kg，加标回收率在95．0％～103．0％之间，相对标准偏差为0．95％～1．53％。结论该方法简单快速，结果与标准方法一致。[ Objective]To find out a simple and rapid method for determining iodine ion in iodided sodium chloride. [Methods]Potassium iodide in phosphoric solution was oxidated by the acid radical of iodic acid, iodine was generated; the reaction of iodine and excessive potassium iodide generated I-3, type 723 spectrometer was applied for the determination with a wave length of 351 nm. [Results]The linear range was 0-60 mg/kg, the detection limit was 0.01 mg/kg, the rate of recovery was 95.0% - 103.0%, the RSD was 0.95% - 1.53%. [Conclusion]This method is simple and rapid, the result accords with that of the standard method.

关 键 词：碘离子 分光光度法 碘盐 

分 类 号：R115[医药卫生—公共卫生与预防医学]