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Sensitive fluorescent detection of melamine in raw milk based on the inner filter effect of Au nanoparticles on the fluorescence of CdTe quantum dots.
Food Chem. 2012 Dec 01; 135(3):1894-900.FC

Abstract

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 0.02mgL(-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.

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Authors+Show Affiliations

Zhang M
Department of Food Quality and Safety, College of Quartermaster Technology, Jilin University, Changchun 130062, China.
Cao X
No affiliation info available
Li H
No affiliation info available
Guan F
No affiliation info available
Guo J
No affiliation info available
Shen F
No affiliation info available
Luo Y
No affiliation info available
Sun C
No affiliation info available
Zhang L
No affiliation info available

MeSH

AnimalsCattleFluorescenceFood ContaminationGoldLimit of DetectionMetal NanoparticlesMilkNanotechnologyQuantum DotsTriazines

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22953938

Citation

Zhang, Minwei, et al. "Sensitive Fluorescent Detection of Melamine in Raw Milk Based On the Inner Filter Effect of Au Nanoparticles On the Fluorescence of CdTe Quantum Dots." Food Chemistry, vol. 135, no. 3, 2012, pp. 1894-900.
Zhang M, Cao X, Li H, et al. Sensitive fluorescent detection of melamine in raw milk based on the inner filter effect of Au nanoparticles on the fluorescence of CdTe quantum dots. Food Chem. 2012;135(3):1894-900.
Zhang, M., Cao, X., Li, H., Guan, F., Guo, J., Shen, F., Luo, Y., Sun, C., & Zhang, L. (2012). Sensitive fluorescent detection of melamine in raw milk based on the inner filter effect of Au nanoparticles on the fluorescence of CdTe quantum dots. Food Chemistry, 135(3), 1894-900. https://doi.org/10.1016/j.foodchem.2012.06.070
Zhang M, et al. Sensitive Fluorescent Detection of Melamine in Raw Milk Based On the Inner Filter Effect of Au Nanoparticles On the Fluorescence of CdTe Quantum Dots. Food Chem. 2012 Dec 1;135(3):1894-900. PubMed PMID: 22953938.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sensitive fluorescent detection of melamine in raw milk based on the inner filter effect of Au nanoparticles on the fluorescence of CdTe quantum dots. AU - Zhang,Minwei, AU - Cao,Xianyi, AU - Li,Hongkun, AU - Guan,Fengrui, AU - Guo,Jiajia, AU - Shen,Fei, AU - Luo,Yeli, AU - Sun,Chunyan, AU - Zhang,Ligong, Y1 - 2012/06/29/ PY - 2012/04/13/received PY - 2012/06/17/revised PY - 2012/06/20/accepted PY - 2012/9/8/entrez PY - 2012/9/8/pubmed PY - 2013/2/7/medline SP - 1894 EP - 900 JF - Food chemistry JO - Food Chem VL - 135 IS - 3 N2 - 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 0.02mgL(-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. SN - 1873-7072 UR - https://www.unboundmedicine.com/medline/citation/22953938/Sensitive_fluorescent_detection_of_melamine_in_raw_milk_based_on_the_inner_filter_effect_of_Au_nanoparticles_on_the_fluorescence_of_CdTe_quantum_dots_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0308-8146(12)01043-6 DB - PRIME DP - Unbound Medicine ER -