Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (8): 958-967.DOI: 10.11944/j.issn.1000-0518.2019.08.180414

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Cyhalothrin Molecularly Imprinted Electrochemical Sensor:Preparation, Performance and Application

QIN Sinan, TANG Luhua, GAO Wenhui   

  1. Research Center for Fermentation Engineering of Hebei,College of Biological Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050000,China
  • Received:2018-12-28 Accepted:2019-04-03 Published:2019-08-01 Online:2019-07-25
  • Contact: Wenhui GAO
  • Supported by:
    Supported by Science and Technology Planning Project of Hebei Province(No.16275503D), Scientific and Technological Research and Development Project of Shijiazhuang City(No.181490372A)

Abstract:

A novel molecularly imprinted electrochemical sensor with specific recognition ability to template molecules and its structural analogs were prepared by electro-polymerization. Cyhalothrin was used as the template molecule and o-phenylenediamine and o-aminophenol as composite functional monomers. The imprinting effect and analytical performance of the sensor were characterized by cyclic voltammetry and square wave voltammetry. A rapid analysis method was established for determination of cyhalothrin residues in agricultural products. Under the optimal conditions, the linear relationship of cyhalothrin was good within the concentration range of 1.0×10-7~1.0×10-5 mol/L, and the detection limit(S/N=3) was 3.0×10-8 mol/L, the average recoveries of spiked sample were between 84.8% and 94.7%, and the relative standard deviations(RSDs) were 1.1%~4.8%(n=5). This sensor has advantages of simple operation, detection speediness, high sensitivity, low cost, good selectivity, stability and reproducibility, which provides it a good application prospect.

Key words: cyhalothrin, molecular imprinting polymer, electrochemical sensor, rapid analysis