Determination of Zn²⁺ Cd²⁺ Pb²⁺ in food base on Bi-Co-BTC electrochemical sensor

Authors

DING Kewu, Fujian Polytechnic Normal University, Fujian Province-Indonesia Marine Food Joint Research and Development Center, Fuzhou, Fujian 350300, China;Fujian Provincial Key Lab of Coastal Basin Environment, Fuzhou, Fujian 350300, China
DAI Lili, Wuhan University, Core Facility, Wuhan, Hubei 430072, ChinaFollow
HUANG Dihui, Fujian Polytechnic Normal University, Fujian Province-Indonesia Marine Food Joint Research and Development Center, Fuzhou, Fujian 350300, China;Fujian Provincial Key Lab of Coastal Basin Environment, Fuzhou, Fujian 350300, China
SUN Zhongwei, Fujian Polytechnic Normal University, Fujian Province-Indonesia Marine Food Joint Research and Development Center, Fuzhou, Fujian 350300, China;Fujian Provincial Key Lab of Coastal Basin Environment, Fuzhou, Fujian 350300, China
YE Ruihong, Fujian Polytechnic Normal University, Fujian Province-Indonesia Marine Food Joint Research and Development Center, Fuzhou, Fujian 350300, China;Fujian Provincial Key Lab of Coastal Basin Environment, Fuzhou, Fujian 350300, China

Corresponding Author(s)

代莉莉（1993—），女，武汉大学实验师，硕士。E-mail：Lilydai@whu.edu.cn黄迪惠（1983—），男，福建技术师范学院副教授，博士。E-mail：huangdihui@163.com

Abstract

Objective: This study focused on the preparation of a new electrochemical sensor for detection of heavy metal content in food. Methods: In this study, a new type of bismuth-based metal-organic framework was prepared by hydrothermal method. 1,3,5-benzenetricarboxylic acid （H₃BTC） was used as a ligand, which supplemented by bismuth nitrate pentahydrate [Bi（NO₃）₃ 5H₂O] and cobalt nitrate hexahydrate [Co（NO₃）₂·6H₂O] metal salts to prepare novel bismuth-based metal-organic frameworks. Bi-based metal-organic framework composites supported by multi-walled carbon nanotubes were prepared by ultrasonic self-assembly. The surface of glassy carbon electrode （GCE） was modified by dropping casting. Results: The Bi-Co-BTC/MWCNTs/GCE was used as the working electrode to realize the simultaneous detection of Zn²⁺, Cd²⁺, and Pb²⁺ in the sample, and the detection limits were 0.040 3, 0.005 69, 0.023 9 ng/mL respectively. The recovery of Zn²⁺,Cd²⁺and Pb²⁺ in the tea were 97.21%～105.44%, 92.22%～106.10% and 93.97%～98.02%, respectively. Conclusion: The results show that Bi-MOF/MWCNTs/GCE can be used to detect the content of heavy metals in food.

Publication Date

10-30-2023

First Page

50

Last Page

56

DOI

10.13652/j.spjx.1003.5788.2022.80631

Recommended Citation

Kewu, DING; Lili, DAI; Dihui, HUANG; Zhongwei, SUN; and Ruihong, YE (2023) "Determination of Zn²⁺ Cd²⁺ Pb²⁺ in food base on Bi-Co-BTC electrochemical sensor," Food and Machinery: Vol. 39: Iss. 9, Article 8.
DOI: 10.13652/j.spjx.1003.5788.2022.80631
Available at: https://www.ifoodmm.cn/journal/vol39/iss9/8

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