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

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (11): 2504.

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

HUANG Hui^1,2, XIANG Dong-Shan1, LI Li¹, LI Hai-Gang¹, ZENG Guo-Ping¹, HE Zhi-Ke^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.

Abstract

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

CLC Number:

0657.39

TrendMD:

HUANG Hui, XIANG Dong-Shan, LI Li, LI Hai-Gang, ZENG Guo-Ping, HE Zhi-Ke*. Rapid and Sensitive Fluorescence Enhancement Method by Barbituric Acid Derivatives for the Determination of Melamine in Milk[J]. Chem. J. Chinese Universities, 2011, 32(11): 2504.

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

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