Tags

Type your tag names separated by a space and hit enter

Rapid determination of melamine in milk using water-soluble CdTe quantum dots as fluorescence probes.
Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2012; 29(3):333-44.FA

Abstract

Water-soluble CdTe quantum dots of different sizes capped with thioglycolic acid (TGA-CdTe QDs) were synthesised via a microwave-assisted method. It was found that melamine could quench the fluorescence emission of TGA-CdTe QDs in aqueous solution. Based on this, a novel method for the determination of melamine has been developed. Under optimum conditions, the fluorescence intensity of TGA-CdTe QDs versus melamine concentrations gave a linear response according to the Stern-Volmer equation. The proposed method has been successfully used to detect melamine in liquid milk with a detection limit of 0.04 mg L⁻¹, and the whole process including sample pre-treatment could be accomplished within 30 min. The obvious merits provided by this method, such as simplicity, rapidity, low cost and high sensitivity would make it promising for on-site screening of melamine adulterant in milk products. The possible mechanism involved in the interaction of melamine with TGA-CdTe QDs is discussed.

Links

Publisher Full Text

Authors+Show Affiliations

Zhang M
Department of Food Quality and Safety, College of Quartermaster Technology, Jilin University, Changchun, China.
Ping H
No affiliation info available
Cao X
No affiliation info available
Li H
No affiliation info available
Guan F
No affiliation info available
Sun C
No affiliation info available
Liu J
No affiliation info available

MeSH

AnimalsCadmium CompoundsCalibrationFeasibility StudiesFluorescent DyesFood ContaminationFood InspectionHydrogen-Ion ConcentrationLimit of DetectionMilkParticle SizeQuantum DotsSolubilitySpectrometry, FluorescenceSurface PropertiesTelluriumThioglycolatesTime FactorsTriazines

Pub Type(s)

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

Language

eng

PubMed ID

22263540

Citation

Zhang, Minwei, et al. "Rapid Determination of Melamine in Milk Using Water-soluble CdTe Quantum Dots as Fluorescence Probes." Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment, vol. 29, no. 3, 2012, pp. 333-44.
Zhang M, Ping H, Cao X, et al. Rapid determination of melamine in milk using water-soluble CdTe quantum dots as fluorescence probes. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2012;29(3):333-44.
Zhang, M., Ping, H., Cao, X., Li, H., Guan, F., Sun, C., & Liu, J. (2012). Rapid determination of melamine in milk using water-soluble CdTe quantum dots as fluorescence probes. Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment, 29(3), 333-44. https://doi.org/10.1080/19440049.2011.643459
Zhang M, et al. Rapid Determination of Melamine in Milk Using Water-soluble CdTe Quantum Dots as Fluorescence Probes. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2012;29(3):333-44. PubMed PMID: 22263540.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Rapid determination of melamine in milk using water-soluble CdTe quantum dots as fluorescence probes. AU - Zhang,Minwei, AU - Ping,Hong, AU - Cao,Xianyi, AU - Li,Hongkun, AU - Guan,Fengrui, AU - Sun,Chunyan, AU - Liu,Jingbo, Y1 - 2012/01/23/ PY - 2012/1/24/entrez PY - 2012/1/24/pubmed PY - 2012/6/22/medline SP - 333 EP - 44 JF - Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment JO - Food Addit Contam Part A Chem Anal Control Expo Risk Assess VL - 29 IS - 3 N2 - Water-soluble CdTe quantum dots of different sizes capped with thioglycolic acid (TGA-CdTe QDs) were synthesised via a microwave-assisted method. It was found that melamine could quench the fluorescence emission of TGA-CdTe QDs in aqueous solution. Based on this, a novel method for the determination of melamine has been developed. Under optimum conditions, the fluorescence intensity of TGA-CdTe QDs versus melamine concentrations gave a linear response according to the Stern-Volmer equation. The proposed method has been successfully used to detect melamine in liquid milk with a detection limit of 0.04 mg L⁻¹, and the whole process including sample pre-treatment could be accomplished within 30 min. The obvious merits provided by this method, such as simplicity, rapidity, low cost and high sensitivity would make it promising for on-site screening of melamine adulterant in milk products. The possible mechanism involved in the interaction of melamine with TGA-CdTe QDs is discussed. SN - 1944-0057 UR - https://www.unboundmedicine.com/medline/citation/22263540/Rapid_determination_of_melamine_in_milk_using_water_soluble_CdTe_quantum_dots_as_fluorescence_probes_ L2 - https://www.tandfonline.com/doi/full/10.1080/19440049.2011.643459 DB - PRIME DP - Unbound Medicine ER -