A robust electrochemical sensor based on AgNWs@MoS2 for highly sensitive detection of thiabendazole residues in food samples

Xuan Zheng; Lei Guo; Chuanhui Zhu; Tao Hu; Xinghou Gong; Chonggang Wu; Guangjin Wang; Hao Dong; Yuanjing Hou

doi:10.1016/j.foodchem.2023.137304

A robust electrochemical sensor based on AgNWs@MoS₂ for highly sensitive detection of thiabendazole residues in food samples

Food Chem. 2024 Feb 1:433:137304. doi: 10.1016/j.foodchem.2023.137304. Epub 2023 Aug 26.

Authors

Xuan Zheng¹, Lei Guo², Chuanhui Zhu², Tao Hu³, Xinghou Gong³, Chonggang Wu³, Guangjin Wang⁴, Hao Dong⁵, Yuanjing Hou⁶

Affiliations

¹ Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 436800, China; Hubei Longzhong Laboratory, Xiangyang 441000, China. Electronic address: zx88@hbut.edu.cn.
² Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 436800, China.
³ Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 436800, China; Hubei Longzhong Laboratory, Xiangyang 441000, China.
⁴ School of Materials Science and Energy Engineering, Foshan University, Foshan 52800, China. Electronic address: wgj501@163.com.
⁵ College of Light Industry and Food Technology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China. Electronic address: donghao@zhku.edu.cn.
⁶ School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430048, China.

PMID: 37683473
DOI: 10.1016/j.foodchem.2023.137304

Abstract

Thiabendazole (TBZ), a highly toxic phosphorothioate insecticide commonly used in postharvest fruit management, has the potential to cause detrimental effects on human health as an endocrine disruptor. In this study, an electrochemical sensor was developed to detect TBZ by modifying MoS₂ on silver nanowires (Ag NWs@MoS₂) and integrating them onto a glassy carbon surface. Cyclic voltammetry revealed that TBZ underwent an irreversible, diffusion-controlled process on Ag NWs@MoS₂, leading to a two-fold increase in peak current compared to unmodified MoS₂. Square wave voltammetry facilitated TBZ detection, and the sensor exhibited a linear range of 0.05-10 μM with a high coefficient of determination (R² = 0.9958) and a limit of detection (LOD) of 1.75 nM (signal-to-noise ratio = 3). The sensor's applicability for food safety monitoring was verified through TBZ analysis in pear and apple samples, achieving recoveries of 95.5-103.6% with RSDs in the range of 1.98-3.25%.

Keywords: Ag nanowires; Biosensor; Food safety; MoS(2); Pesticide.

MeSH terms

Electrochemical Techniques
Fruit / chemistry
Humans
Molybdenum / chemistry
Nanowires*
Silver / analysis
Thiabendazole* / analysis

Substances

Thiabendazole
Molybdenum
Silver