Novel electrochemical sensor modified with molecularly imprinted polymers for determination of enrofloxacin in marine environment
文献类型： 外文期刊
作者： Chen, Jianlei 1 ; Tan, Liju 1 ; Qu, Keming 2 ; Cui, Zhengguo 2 ; Wang, Jiangtao 1 ;
作者机构： 1.Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China
2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Marine Fishery Environm & Bioremediat Lab, Qingdao 266071, Peoples R China
关键词： Molecularly imprinted polymers; Electrochemical detection; Voltammetry; Enrofloxacin; Multi-walled carbon nanotubes; Marine environment
期刊名称：MICROCHIMICA ACTA （ 影响因子：6.408； 五年影响因子：5.888 ）
ISSN： 0026-3672
年卷期： 2022 年 189 卷 3 期
页码：
收录情况： SCI
摘要： Molecularly imprinted polymers were synthesized by gel-sol method with multi-walled carbon nanotubes as support and enrofloxacin as a template and further modified on the surface of glassy carbon electrode to construct a molecularly imprinted electrochemical sensor. The performance of the imprinted electrochemical sensor was thoroughly investigated by using cyclic voltammetry and differential pulse voltammetry. The influence of imprinted polymers amount, electrolyte pH, and incubation time on the sensor performance was investigated for the detection of enrofloxacin. Under the optimal experimental conditions in a three-electrode system with the modified electrode as the working electrode the differential pulse voltammetry response current of the sensor had a good linear relationship at 0.2 V (vs. saturated calomel reference electrode) with the enrofloxacin concentration within 2.8 pM-28 mu M and the limit of detection of the method was 0.9 pM. The competitive interference experiment showed that the imprinted electrochemical sensor could selectively recognize enrofloxacin. The method was applied to analyze spiked natural seawater, fish, and shrimp samples. The recovery was 96.4%-102%, and RSD was less than 4.3% (n = 3), indicating that the proposed imprinted electrochemical sensor was suitable for the determination of trace enrofloxacin in marine environment samples.
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