A Molecularly Imprinted Electrochemical Sensor MIP/Cu-MOF/rGO/AuNPs/GCE for Highly Sensitive Detection of Electroneutral Organophosphorus Pesticide Residues

Overview

Journal Mikrochim Acta

Specialties Biotechnology
Chemistry

Date 2024 May 23

PMID 38780645

Authors

Yujun Zhong

Zhiyang Li

Anlin Zhang

Yuqing Peng

Hao Zhou

Bin Wang

Lianwu Xie

YaPing Guo

Affiliations

Soon will be listed here.

Abstract

A novel electrochemical sensor, MIP/Cu-MOF/rGO/AuNPs/GCE, was developed by depositing gold nanoparticles, coating Cu-MOF/GO on the surface of glassy carbon electrode (GCE) before electroreducing graphene oxide (GO) to rGO and covering molecularly imprinted membrane by electropolymerization for highly sensitive detection of electroneutral organophosphorus pesticide residues in agricultural product. Cyclic voltammetry, differential pulse voltametry, scanning electron microscopy, energy-dispersive spectroscopy, and atomic force microscopy were used to characterize the imprinted sensor. Several key factors such as chitosan concentration, suspension volume, pH of polymerization solution, and polymerization scanning rate during preparation of the imprinted sensor were optimized in detail. When electroneutral phosmet was used as a template, the linear range of MIP/Cu-MOF/rGO/AuNPs/GCE for detecting phosmet was 1.00 × 10-5.00 × 10 mol/L with the limit of detection of 7.20 × 10 mol/L at working potentials of - 0.2 to 0.6 V. The selectivity, reproducibility, and repeatability of MIP/Cu-MOF/rGO/AuNPs/GCE were all acceptable. The recoveries of this method for determining phosmet in real samples ranged from 94.2 to 106.5%. The MIP/Cu-MOF/rGO/AuNPs/GCE sensor could be applied to detect electroneutral pesticide residues in organisms and agricultural products.

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