期刊
LWT-FOOD SCIENCE AND TECHNOLOGY
卷 47, 期 1, 页码 147-153出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.lwt.2011.12.021
关键词
Melamine; Fluorospectrophotometry; Alizarin red; UV-Vis spectra; Mechanism
资金
- Science and Technology Project of Hunan Province, China [2009FJ3067]
Melamine, a basic organic chemical intermediate, can cause renal failure because of the formation of insoluble melamine cyanurate crystals in the kidneys. This study examined a novel fluorescence spectrometry for the determination of trace melamine in dairy. The method was based on the inhibitory effect of melamine on the decolorizing reaction of the uncatalytic oxidation of acridine red by potassium permanganate in a sulfuric acid medium. The calibration graph was linear for melamine concentrations of 2.1 x 10(-4)-1.6 mg/L, and a detection limit of 61.5 ng/L was obtained. The melamine was determined in dairy samples by the proposed method after liquid-liquid and solid phase extraction. The results correlated with the high-performance liquid chromatography. The recoveries were within the range of 99.6-103.3% for liquid milk and 98.5-111.1% for milk powder. The possible mechanism of the reaction was also investigated by ultraviolet spectra. (C) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据