Rapid detection of cadmium ions in meat by a multi-walled carbon nanotubes enhanced metal-organic framework modified electrochemical sensor

Xin Wang; Yiwei Xu; Yahui Li; Yanxiao Li; Zhihua Li; Wen Zhang; Xiaobo Zou; Jiyong Shi; Xiaowei Huang; Chao Liu; Wenting Li

doi:10.1016/j.foodchem.2021.129762

Rapid detection of cadmium ions in meat by a multi-walled carbon nanotubes enhanced metal-organic framework modified electrochemical sensor

Food Chem. 2021 Apr 9:357:129762. doi: 10.1016/j.foodchem.2021.129762. Online ahead of print.

Authors

Xin Wang¹, Yiwei Xu², Yahui Li², Yanxiao Li³, Zhihua Li², Wen Zhang², Xiaobo Zou⁴, Jiyong Shi⁵, Xiaowei Huang², Chao Liu², Wenting Li²

Affiliations

¹ Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; China-UK Joint Laboratory for Nondestructive Detection of Agro-products, Jiangsu University, Zhenjiang, Jiangsu 212013, China; Center of Analysis and Test, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
² Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; China-UK Joint Laboratory for Nondestructive Detection of Agro-products, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
³ Center of Analysis and Test, Jiangsu University, Zhenjiang, Jiangsu 212013, China. Electronic address: [email protected].
⁴ Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; China-UK Joint Laboratory for Nondestructive Detection of Agro-products, Jiangsu University, Zhenjiang, Jiangsu 212013, China. Electronic address: [email protected].
⁵ Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; China-UK Joint Laboratory for Nondestructive Detection of Agro-products, Jiangsu University, Zhenjiang, Jiangsu 212013, China. Electronic address: [email protected].

PMID: 33872870
DOI: 10.1016/j.foodchem.2021.129762

Abstract

This work presents an electrochemical device based on a composite modification of amine functionalized Zr(IV) metal-organic framework (UiO-66-NH₂) and multi-walled carbon nanotubes (MWCNTs) for voltammetry determination of cadmium ions (Cd²⁺). The UiO-66-NH₂@MWCNTs composites were prepared by one-pot hydrothermal reaction. The prepared sensor performs excellent performance, which was attributed to the synergism between UiO-66-NH₂ with a special octahedral structure and enlarged surface area and MWCNTs with outstanding conductivity. Under optimal experiment condition, the fabricated sensor showed good linear relationship from 0.5 to 170 μg/L, with a detection limit of 0.2 μg/L. Finally, the sensor was successfully applied to detect Cd²⁺ in meat samples (N = 21) with relative standard deviation (RSD) lower than 4.5% and recovery of 95.1-107.5%, and the results were compared with certified method, there was no statistical significance difference between the developed sensor and certified method at a 95% confidence level.

Keywords: Cadmium ions; Differential pulse voltammograms method; Electrochemical sensor; Metal–organic framework; Multi-walled carbon nanotubes.