Coordination array for accurate colorimetric sensing of multiple heavy metal ions

Lihong Yu; Yuehong Pang; Zhenglian Mo; Yuying Huang; Xiaofang Shen

doi:10.1016/j.talanta.2021.122357

Coordination array for accurate colorimetric sensing of multiple heavy metal ions

Talanta. 2021 Aug 15:231:122357. doi: 10.1016/j.talanta.2021.122357. Epub 2021 Mar 31.

Authors

Lihong Yu¹, Yuehong Pang², Zhenglian Mo¹, Yuying Huang², Xiaofang Shen³

Affiliations

¹ State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.
² State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.
³ State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China. Electronic address: xfshen@jiangnan.edu.cn.

PMID: 33965024
DOI: 10.1016/j.talanta.2021.122357

Abstract

Heavy metals detection is of great significance to the environment and human health, and most of the detection methods require expensive instruments and laborious operation. Herein, we present a coordination array for accurate and rapid colorimetric heavy metal ions sensing. The array was composed of six chelates and has cross response to Hg²⁺, Cd²⁺, Pb²⁺ and Cu²⁺. The results could be observed by naked eyes or detected by plate reader combined with pattern analysis. Linear discrimination analysis was applied for the pattern analysis and the four heavy metal ions (Pb²⁺, Cd²⁺, Hg²⁺ and Cu²⁺) generated a clustering map at 1 μM. The coordination array demonstrates a great potential for sensing heavy metal ions simultaneously.

Keywords: Colorimetric; Coordination array; Cross sensing; Environmental monitoring; Heavy metal ions.