Cadmium ions mediated turn-on electrogenerated chemiluminescence of ZnS nanoparticles for highly selective cadmium detection in seafood

Shan Chen; Yuhao Zheng; Biqi Zhang; Zongxiong Huang; Guohailin Xu; Jingwen Chen; Mingyan Qian; Hao Sun; Jinghu Chen; Jun Liu; Jian-Jun Sun; Yimin Fang

doi:10.1016/j.aca.2023.341363

Cadmium ions mediated turn-on electrogenerated chemiluminescence of ZnS nanoparticles for highly selective cadmium detection in seafood

Anal Chim Acta. 2023 Jul 25:1266:341363. doi: 10.1016/j.aca.2023.341363. Epub 2023 May 12.

Authors

Shan Chen¹, Yuhao Zheng², Biqi Zhang³, Zongxiong Huang⁴, Guohailin Xu⁵, Jingwen Chen⁶, Mingyan Qian⁶, Hao Sun², Jinghu Chen², Jun Liu⁶, Jian-Jun Sun⁷, Yimin Fang⁸

Affiliations

¹ Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Key Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Nanjing, 210014, Jiangsu, China. Electronic address: chenshan@jaas.ac.cn.
² Key Laboratory of Cardiovascular & Cerebrovascular Medicine, School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
³ Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China.
⁴ National Textile and Garment Quality Supervision Testing Center, Fujian Fiber Inspection Center, Fuzhou, 350026, Fujian, China.
⁵ Institute of Agricultural Engineering, Jiangsu University, Zhenjiang, 212001, China.
⁶ Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Key Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Nanjing, 210014, Jiangsu, China.
⁷ Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China. Electronic address: jjsun@fzu.edu.cn.
⁸ Key Laboratory of Cardiovascular & Cerebrovascular Medicine, School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China. Electronic address: yfang@njmu.edu.cn.

PMID: 37244660
DOI: 10.1016/j.aca.2023.341363

Abstract

Cd²⁺ is one of the most toxic heavy metal ions that can be easily accumulated in human body via food chain. Thus, the onsite detection of Cd²⁺ in food is very important. However, present methods for Cd²⁺ detection either require the use of large equipment, or suffer from the severe interference from other analogical metal ions. This work establishes a facile Cd²⁺ mediated turn-on ECL method for highly selective detection of Cd²⁺ via cation exchanging with the nontoxic ZnS nanoparticles, owing to the unique surface-state ECL properties of CdS nanomaterials. The linear range of the calibration curve is from 7.0 × 10^-8 to 1.0 × 10^-6 M, while other analogical metal ions do not interfere, facilitating the selective detection of Cd²⁺ in oyster samples. The result agrees well with that obtained using atomic emission spectroscopy, indicating the potential for wider application of this approach.

Keywords: Cadmium ion; Cation exchange; Electrogenerated chemiluminescence; Food samples; ZnS nanoparticles.

MeSH terms

Cadmium*
Humans
Ions
Luminescence
Nanoparticles* / chemistry
Sulfides / chemistry

Substances

Cadmium
zinc sulfide
Sulfides
Ions