食品科学 ›› 2006, Vol. 27 ›› Issue (8): 235-236.

• 分析检测 • 上一篇    下一篇

阻抑酸性品红褪色动力学光度法测定痕量碘

 申湘忠, 李家其, 刘志成   

  1. 湖南人文科技学院化学与材料科学系
  • 出版日期:2006-08-15 发布日期:2011-10-14

Kinetic Spectrophotometric Determination of Trace Iodine Based on the Inhibitory Effect on Discoloring of Fuchsin Acid

 SHEN  Xiang-Zhong, LI  Jia-Qi, LIU  Zhi-Cheng   

  1. Department of Chemistry and Material Science,Hunan Institute of the Humanities,Science and Technology,Loudi 417000,China
  • Online:2006-08-15 Published:2011-10-14

摘要: 研究了在稀H2SO4介质中,痕量碘离子对溴酸钾氧化酸性品红的阻抑作用及其动力学条件,建立了测定痕量碘离子的阻抑动力学光度分析的新方法。测定碘离子的线性范围为0~0.04μg/ml,检出限为1.1×10-9g/ml。已用于食品中痕量碘的测定。

关键词: 酸性品红, 碘, 阻抑褪色反应, 分光光度法

Abstract: An inhibitory kinetic spectrophotometric method was proposed for the determination of trace iodine.The method was based on the inhibitory discoloring effect of iodine on the oxidation of fuchsin acid by KBrO3 in H2SO4 medium.The linear range of determination is 0~0.04μg/ml.The detection limit is 1.1×10-8g/ml.The method has been used for the determination of traee iodine in food.

Key words: fuchsin aicd, iodine, inhibitory decolouring reaction, spectyophotometry