食品科学 ›› 2004, Vol. 25 ›› Issue (3): 155-158.

• 分析检测 • 上一篇    下一篇

胶束增溶光度法测定味精中微量铁

 涂建平   

  1. 四川工商职业技术学院技术工程系
  • 出版日期:2004-03-15 发布日期:2011-10-24

Determination of Miniscule Amount of Iron in MSG by Micellar Enhanced Spectrophotometry

 TU  Jian-Ping   

  1. Technology Department of Sichuan Technology and Business College
  • Online:2004-03-15 Published:2011-10-24

摘要: 本文利用非离子表面活性剂存在下的胶束增溶、增敏作用,提高分光光度法显色反应的灵敏度,研究并建立了高灵敏度的铬天青-溴化十六烷基三甲铵分光光度法测定味精中微量铁的新方法。测定线性范围为0.0~14.0μg/25ml,方法检出限为8.4×10-8g/ml。该方法重现性好、准确度高、操作简便、测定结果令人满意。

关键词: 胶束增溶, 分光光度法,

Abstract: By means of the existence of Non-ion surfactant to enhance its micellar and sensitivity.This article mainly discussedtheimprovement of sensitivity of color reaction by the method of spectrophotometry. And it also summarized the research and the newmethod of determination of miniscule amount of iron in monosodium glutamate by spctrophotometry method by using the highsensitive and selective surfactant-Chrome azurol S CTAB .This determination of linear range was 014μg/25ml. And its limit ofproof-test was 8.4×10-8 g/ml. This method also has a good fidelity and high precision with easy operation and satisfied test results.

Key words: micelle enhancing, spectrophotometry, iron