Sensitive fluorescent detection of melamine in raw milk based on the inner filter effect of Au nanoparticles on the fluorescence of CdTe quantum dots

被引：112
作者：
Zhang, Minwei [1 ]
Cao, Xianyi [1 ]
Li, Hongkun [1 ]
Guan, Fengrui [1 ]
Guo, Jiajia [1 ]
Shen, Fei [1 ]
Luo, Yeli [1 ]
Sun, Chunyan [1 ]
Zhang, Ligong [2 ]
机构：
[1] Jilin Univ, Coll Quartermaster Technol, Dept Food Qual & Safety, Changchun 130062, Peoples R China
[2] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Luminescence & Applicat, Changchun 130033, Peoples R China
来源：
FOOD CHEMISTRY | 2012年 / 135卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Inner filter effect; Fluorescence; Gold nanoparticles; CdTe quantum dots; Melamine; Milk; ENERGY-TRANSFER FRET; GOLD NANOPARTICLES; VISUAL DETECTION; MASS-SPECTROMETRY; NANOCRYSTALS; PRODUCTS; CDSE;
D O I：
10.1016/j.foodchem.2012.06.070
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A simple, rapid and sensitive fluorescent assay for determination of melamine has been developed based on inner filter effect (IFE) of gold nanoparticles (AuNPs) on the fluorescence of CdTe quantum dots (QDs). When thioglycolic acid-capped CdTe QDs was mixed with citrate-stabilized AuNPs, the fluorescence of CdTe QDs was significantly quenched via the IFE of AuNPs. With the presence of melamine, melamine could induce the aggregation and corresponding absorbance change of AuNPs, which then resulted in the recovery of IFE-decreased emission of CdTe QDs. Under the optimum conditions, the detection limit for melamine in raw milk was 0.02 mg L-1. The application of this method in samples of melamine-spiked raw milk suggested a recovery between 103% and 104%. Therefore, the obvious merits provided by the present assay, such as simplicity, rapidity, low cost, and high sensitivity, would make it promising for on-site screening of melamine adulterant in raw milk. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：1894 / 1900
页数：7
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