期刊
BIOSENSORS & BIOELECTRONICS
卷 99, 期 -, 页码 268-273出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2017.07.071
关键词
FeSe quantum dot; Molecularly imprinted; Cyfluthrin; Determination
类别
资金
- National Natural Science Foundation of China [31372572]
- Zhejiang Provincial Natural Science Foundation of China [LR16C190001, LY15C190002]
- Public Science and Technology Research Funds Projects of Ocean [201405035]
- Technology Innovation Team of Ningbo City [2015C110018]
- Ningbo Science and Technology Bureau [2014C10063]
- Zhejiang Provincial Food and Drug Administration [2015002]
- Open Fund of Zhejiang Provincial Top Key Discipline of Aquaculture in Ningbo University [xlasc1515]
- K.C. Wong Magna Fund in Ningbo University
A novel molecularly imprinted silica layer,appended to FeSe quantum dots (MIP-FeSe-QDs) was fabricated and utilized as a recognition element to develop a selective and sensitive fluorescent nanosensor for cyfluthrin (CYF) determination. The MIP-FeSe-QDs were characterized by fluorescence spectrometry, scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy. Excellent selectivity and high sensitivity of MIP-FeSe-QDs to CYF molecules were observed based on the fluorescence quenching of FeSe-QDs. Under optimal conditions, a good linear relationship was found between fluorescence quenching effect and increased CYF concentration within 0.010-0.20 mg/L, with a correlation coefficient of 0.9911. The practicality of the developed sensor method for CYF detection in fish and sediment samples was further validated. Good recoveries ranging from 88.0% to 113.9% with < 6.8% relative standard deviations were obtained. The detection limits of CYF in sediment and fish samples were 1.3 and 1.9 mu g/kg, respectively. This study established a novel, rapid fluorescent nanosensor detection method based on MIP-QDs for successfully analyzing CYF in fish and sediment samples.
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