Journal
FOOD CHEMISTRY
Volume 229, Issue -, Pages 847-853Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.02.144
Keywords
Malachite green; CdTe quantum dots; Molecularly imprinted polymers; Fluorescence probe; Fish
Funding
- Science and Technology Planning Project of Fujian Province, China [2016Y0064, 2014Y0045]
- EUR-cooperative Foundation of Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources [FJMBIO1605]
- Science and Technology Planning Project of Xiamen, China [3502Z20143018]
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering [M20140902]
- Foundation for Innovative Research Team of Jimei University, China [2010A007]
- Fujian Undergraduate Training Programs for Innovation and Entrepreneurship [201610390037, 201610390042]
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A sensitive fluorescence sensor for the detection of malachite green (MG) was fabricated by grafting molecularly imprinted polymers (MIPs) onto the surface of CdTe quantum dots (QDs). The MIP-coated QDs were synthesized via a reverse microemulsion method using (3-aminopropyl)triethoxysilane (APTES) and tetraethyl orthosilicate (TEOS) as functional monomer and cross-linker, respectively. The optimum molar ratio of MG, functional monomer and cross-linker was 1:3:10. The MIP-coated QDs exhibited uniform spheres with diameter around 49 nm and excellent fluorescence emission at lambda(ex) 370 nm. A linear relationship with two segments between the relative fluorescence intensities and the MG concentrations ranging from 0.08 to 20 mu mol.L-1 could be obtained with a detection limit of 12 mu g.kg(-1). The fluorescent probe was successfully applied to the determination of MG in fish samples with the spiked recoveries ranging from 94.3% to 109.5% which were in accordance with those of the measurement by HPLC-UV. (C) 2017 Elsevier Ltd. All rights reserved.
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