In Situ Colorimetric Recognition of Melamine Based on Thymine Derivative-Functionalized Gold Nanoparticle

被引:23
|
作者
Du, Jianjun [1 ]
Wang, Zhenkuan [1 ]
Peng, Xiaojun [1 ]
Fan, Jiangli [1 ]
机构
[1] Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China
关键词
ENHANCED RAMAN-SCATTERING; VISUAL DETECTION; SENSITIVE DETECTION; RAW-MILK; LIQUID-CHROMATOGRAPHY; PLASMONIC PROPERTIES; PROBE; PRODUCTS; RESIDUES; SENSOR;
D O I
10.1021/acs.iecr.5b02399
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A simple, fast, and convenient colorimetric sensing system is presented for melamine recognition in milk samples by thymine-derivative- (NT-) decorated gold nanoparticles (AuNPs), based on the complementary hydrogen bond between thymine and melamine, wherein the introduction of melamine causes a rapid and obvious red-to-blue color change. Therefore, the melamine content in milk can be qualitatively recognized by the naked eye and quantitatively measured by measuring absorbance. NT-AuNPs show excellent selectivity to melamine against any other tested molecules, anions, and metal ions, as well as very good sensitivity that can distinguish melamine-contaminated milk from safe milk with a limit of detection of 3.5 nM.
引用
收藏
页码:12011 / 12016
页数:6
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