高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (11): 2504.

• 研究论文 • 上一篇    下一篇

巴比妥酸衍生物荧光增强法快速测定牛奶中的三聚氰胺

黄晖1,2, 向东山1, 李丽1, 李海刚1, 曾国平1, 何治柯1   

  1. 1. 武汉大学化学与分子科学学院, 生物医学分析化学教育部重点实验室, 武汉 430072;
    2. 三明学院化学与生物工程系, 三明 365000
  • 收稿日期:2011-01-17 修回日期:2011-03-17 出版日期:2011-11-10 发布日期:2011-10-14
  • 通讯作者: 何治柯 E-mail:zhkhe@whu.edu.com
  • 基金资助:

    国家自然科学基金(批准号: 21075093)资助.

Rapid and Sensitive Fluorescence Enhancement Method by Barbituric Acid Derivatives for the Determination of Melamine in Milk

HUANG Hui1,2, XIANG Dong-Shan1, LI Li1, LI Hai-Gang1, ZENG Guo-Ping1, HE Zhi-Ke1*   

  1. 1. Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China;
    2. Department of Chemistry and Bio\|Engineering, Sanming University, Sanming 365000, China
  • Received:2011-01-17 Revised:2011-03-17 Online:2011-11-10 Published:2011-10-14
  • Contact: HE Zhi-Ke E-mail:zhkhe@whu.edu.com
  • Supported by:

    国家自然科学基金(批准号: 21075093)资助.

摘要: 建立了一种简单快速测定三聚氰胺的方法. 在pH=7.0的磷酸盐缓冲溶液中, 三聚氰胺与巴比妥酸衍生物(DBA)形成稳定的氢键, 使三聚氰胺的荧光强度显著增强, 由此建立了巴比妥酸衍生物荧光增强测定牛奶中三聚氰胺的新方法. 在优化的条件下, 该方法的线性范围为12.5~1250 μg/L, 检出限为7.5 μg/L, 相对标准偏差为2.06%, 样品平均加标回收率为96.62%. 本方法简便、快速、准确, 可用于大量牛奶样品中三聚氰胺的快速检测.

关键词: 三聚氰胺, 巴比妥酸衍生物, 荧光增强

Abstract: A rapid and sensitive fluorescence enhancement method was developed for the determination of melamine in milk. In phosphate buffer solution(pH=7.0), the hydrogen bond between melamine(M) and 5-(9-anthracenylmethylene) barbituric acid(DBA) can be formed and the fluorescence intensity of melamine increased greatly when DBA presented. Under the optimized conditions, the linear dynamic range, the detection limit and the relative standard deviation were 12.5~1250 μg/L, 7.5 μg/L and 2.06%, respectively. Combined with the solid phase extraction monolithic column to pretreat the samples, the average value of recovery rates was 96.62%. The proposed method has been successfully applied for the determination of melamine in milk.

Key words: Melamine, Barbituric acid derivative(DBA), Fluorescence enhancement

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