食品科学 ›› 2010, Vol. 31 ›› Issue (22): 407-410.doi: 10.7506/spkx1002-6630-201022090

• 分析检测 • 上一篇    下一篇

微乳液增敏光度法测定面制食品中的铝

周菊峰1,谢 红1,彭爱姣2,张 辉1   

  1. 1.湘南学院化学与生命科学系 2.湘南学院图书馆
  • 收稿日期:2010-02-01 出版日期:2010-11-25 发布日期:2010-12-29
  • 通讯作者: 周菊峰 E-mail:hnsd333@126.com

Determination of Aluminum in Flour Food by Microemulsion Sensitization-Spectrophotometry

ZHOU Ju-feng1,XIE Hong1,PENG Ai-jiao2,ZHANG Hui1   

  1. 1. Department of Chemistry and Life Sciences, Xiangnan University, Chenzhou 423000, China;
    2. Library of Xiangnan University, Chenzhou 423000, China
  • Received:2010-02-01 Online:2010-11-25 Published:2010-12-29
  • Contact: ZHOU Ju-feng E-mail:hnsd333@126.com

摘要:

目的:在微乳液介质中,用分光光度法测定面制食品中铝的含量。方法:样品经智能消解仪消解,在聚乙烯醇、正丁醇、正庚烷和水构成的微乳液中,以乙酸- 乙酸钠为缓冲体系,用铬天青S 作显色剂,其吸光度与铝含量在一定质量浓度范围内呈正比。结果:铝含量在0~6.0μg/25mL 之间线性关系良好,相关系数r=0.9971,回收率在95%~108% 之间。结论:该方法简便、灵敏、稳定,适用于面制食品中铝的测定。

关键词: 智能消解仪, 微乳液, 铬天青S, 分光光度法, 面制食品,

Abstract:

Objective: To determine the content of aluminum in flour with spectrophotometry in microemulsion medium. Methods: Samples were dissolved using an intelligent electronic digestion system in microemulsion medium composed of PVA, n-butanol, n-heptanol and water in acetic acid-sodium acetate buffer system. The chromogenic agent was chrome azurol S (CAS) and the absorbance has a direct proportion to the concentration of aluminum in solution. Results: Standard curve revealed an excellent linearity within the range of 0.0-6.0 μg/25 mL with a correlation coefficient of 0.9971. The recovery rates of spiked samples were 95%-108%. Conclusion: This method is simple, sensitive and stable, and it can be used to determine the content of aluminum in flour.

Key words: intelligent digestion system, microemulsion, chrome azurol S, spectrophotometry, flour products, aluminum

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