食品科学 ›› 2002, Vol. 23 ›› Issue (4): 114-117.

• 分析检测 • 上一篇    下一篇

催化动力学光度法测定食盐中碘含量

 涂建平   

  1. 四川工商职业技术学院工程系
  • 出版日期:2002-04-15 发布日期:2012-02-13

Study on Catalytic Dynamics Photometric method to Assay I2 Content in Salt

 TU  Jian-Ping   

  • Online:2002-04-15 Published:2012-02-13

摘要: 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。

关键词: 催化反应, 动力学光度法, 碘, 食盐

Abstract: 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.

Key words: Catalytic , Kinetic spectrophotometry , Iodine , Salt.