期刊
FOOD CONTROL
卷 132, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2021.108438
关键词
Fluorescence nanosensor; Molecularly imprinted; Quantum dot; Diethylstilbestrol; Cypermethrin
资金
- National Key Research and Development Project [2019YFD0901700]
This study developed a fluorescence nanosensor using MIP-CdSe/CdS/ZnS QDs as optosensing materials to selectively detect DES and CYP, showing good linear relationships and satisfactory recoveries for low concentrations in seawater and fish.
The surface molecularly imprinted layer coated CdSe/CdS/ZnS quantum dots (MIP-CdSe/CdS/ZnS QDs) was developed and utilized as the selective optosensing materials of the fluorescence nanosensor to diethylstilbestrol (DES) and cypermethrin (CYP), respectively. The surface morphology, functional group and fluorescence spectroscopy were conducted to demonstrate the fluorescence quenching response of MIP-CdSe/CdS/ZnS QDs to DES/CYP. Under their individual optimal conditions, good linear relationships for DES and CYP were observed in the range of 0.050-20.0 mg/L and 0.10-20.0 mg/L. In addition, the recoveries reached a satisfactory level of 91.4%-101.5 % with an RSD value less than 5.4 % for the samples of seawater and fish. The corresponding limits of detection in seawater and fish can reach 0.004 mu g/L and 3.0 mu g/kg (DES), and 0.3 mu g/L and 5.0 mu g/kg (CYP). This study provided a general strategy for fabricating an efficient fluorescence nanosensor based on a dual template MIP-CdSe/CdS/ZnS QDs to selectively detect different analytes in their individual optimum conditions.
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