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Toxins 2018, 10(11), 438; https://doi.org/10.3390/toxins10110438

Carbon Quantum Dots Encapsulated Molecularly Imprinted Fluorescence Quenching Particles for Sensitive Detection of Zearalenone in Corn Sample

1
College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
2
Centre of Excellence in Mycotoxicology and Public Health, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Received: 1 October 2018 / Revised: 24 October 2018 / Accepted: 26 October 2018 / Published: 28 October 2018
(This article belongs to the Special Issue Advanced Methods for Mycotoxins Detection)
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Abstract

An eco-friendly and efficient one-step approach for the synthesis of carbon quantum dots (CDs) that encapsulated molecularly imprinted fluorescence quenching particles (MIFQP) and their application for the determination of zearalenone (ZEA) in a cereal sample are described in this study. CDs with high luminescence were first synthesized, and then encapsulated in the silica-based matrix through a non-hydrolytic sol-gel process. The resulting ZEA-imprinted particles exhibited not only an excellent specific molecular recognition of ZEA, but also good photostability and obvious template binding-induced fluorescence quenching. Under the optimized conditions, the fluorescence intensity of MIFQP was inversely proportional to the concentration of ZEA. By validation, the detection range of these fluorescence quenching materials for ZEA was between 0.02 and 1.0 mg L−1, and the detection limit was 0.02 mg L−1 (S/N = 3). Finally, the MIFQP sensor was successfully applied for ZEA determination in corn with recoveries from 78% to 105% and the relative standard deviation (RSD %) was lower than 20%, which suggests its potential in actual applications. View Full-Text
Keywords: molecularly imprinted fluorescence quenching particles; carbon quantum dots; non-hydrolytic sol-gel; zearalenone; fluorescence quenching molecularly imprinted fluorescence quenching particles; carbon quantum dots; non-hydrolytic sol-gel; zearalenone; fluorescence quenching
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Shao, M.; Yao, M.; Saeger, S.D.; Yan, L.; Song, S. Carbon Quantum Dots Encapsulated Molecularly Imprinted Fluorescence Quenching Particles for Sensitive Detection of Zearalenone in Corn Sample. Toxins 2018, 10, 438.

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