Selective determination of dimethoate via fluorescence resonance energy transfer between carbon dots and a dye-doped molecularly imprinted polymer
文献类型： 外文期刊
作者： Li, Shuhuai 1 ; Luo, Jinhui 1 ; Yin, Guihao 1 ; Xu, Zhi 1 ; Le, Yuan 1 ; Wu, Xiaofang 2 ; Wu, Nancun; Zhang, Qun;
作者机构： 1.Chinese Acad Trop Agr Sci, Anal & Test Ctr,Minist Agr, Lab Qual & Safety Risk Assessment Trop Prod Haik, Hainan Prov Key Lab Qual & Safety Trop Fruits & V, Haikou 571101, Peoples R China
2.Chinese Acad Trop Agr Sci, Anal & Test Ctr,Minist Agr, Lab Qual & Safety Risk Assess
关键词： Molecular imprinting;Carbon dots;Fluorescence resonance energy transfer;Dimethoate
期刊名称：SENSORS AND ACTUATORS B-CHEMICAL （ 影响因子：7.46； 五年影响因子：6.743 ）
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收录情况： SCI
摘要： A novel molecularly imprinted fluorescent sensor was developed for dimethoate determination based on fluorescence resonance energy transfer. First, a doped molecular template polymer was prepared by electropolymerization. During dimethoate detection, a competitive reaction occurred between dimethoate and carbon dot labeled dimethoate. Fluorescence resonance energy transfer between residual carbon dots labeled dimethoate in the sensor and methyl red on the doped molecularly imprinted polymer then occurred, enhancing the fluorescence signal of the sensor. The fluorescence intensity decreased when the carbon dots labeled dimethoate molecules were replaced by dimethoate molecules in the samples. Under optimal conditions, good linear correlation was obtained for dimethoate over the concentration range from 6 x 10(-1) mol/L to 3.4 x 10(-8) mol/L with a detected limit of 1.83 x 10(-11) mol/L. This sensor was used to detect for dimethoate in actual samples, for which recoveries ranging from 95.0% to 106.0% were obtained. (C) 2014 Elsevier B.V. All rights reserved.
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