A Rapid Colorimetric Detection of Melamine in Raw Milk by Unmodified Gold Nanoparticles

被引：28
作者：
Xing, Hai-bo [1 ,2 ,5 ]
Wu, Yuan-gen [1 ,2 ]
Zhan, Shen-shan [1 ,2 ]
Zhou, Pei [1 ,2 ,3 ,4 ,5 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China
[2] Minist Agr, Key Lab Urban Agr South, Shanghai, Peoples R China
[3] Shanghai Jiao Tong Univ, Sch Agr & Biol, Shanghai 200240, Peoples R China
[4] Shanghai Jiao Tong Univ, Bor S Lug Food Safety Res Ctr, Shanghai 200240, Peoples R China
[5] Shanghai Jiao Tong Univ, Ctr Food Nutr & Safety, Shanghai 200240, Peoples R China
来源：
FOOD ANALYTICAL METHODS | 2013年 / 6卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Melamine; Colorimetric detection; Raw milk; Unmodified gold nanoparticles; Interaction principle; VISUAL DETECTION; MASS-SPECTROMETRY; CYANURIC ACID; PRODUCTS;
D O I：
10.1007/s12161-013-9562-3
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
We report a rapid, visual, facile colorimetric detection of melamine in raw milk by unmodified gold nanoparticles (AuNPs). AuNPs can be induced by melamine from dispersion to aggregation rapidly, along with the color change from red to blue (or purple). After the optimization of reaction conditions, the whole analysis only needs about 20 min including the simple pretreatment we designed. The analysis can be observed by the naked eye and simple to operate without sophisticated instruments. In the raw milk, the present limit of detection for melamine is down to similar to 70 ppb. Furthermore, we explore the interaction principle between melamine and citrate-stabilized AuNPs in this work and establish the foundation for modifying the AuNPs and optimizing the system of AuNPs-melamine in the future.
引用
收藏
页码：1441 / 1447
页数：7
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