Portable instrument based on color sensor chip for on-site rapid detection of dissolved sulfides in environmental water samples

Ge Gao; Ji Qi; Longwen Fu; Rongfang Zhao; Zhiyang Zhang; Lingxin Chen

doi:10.1016/j.jhazmat.2023.132440

Portable instrument based on color sensor chip for on-site rapid detection of dissolved sulfides in environmental water samples

J Hazard Mater. 2023 Oct 15:460:132440. doi: 10.1016/j.jhazmat.2023.132440. Epub 2023 Aug 29.

Authors

Ge Gao¹, Ji Qi², Longwen Fu³, Rongfang Zhao², Zhiyang Zhang², Lingxin Chen⁴

Affiliations

¹ CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China.
² CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
³ CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China. Electronic address: lwfu@yic.ac.cn.
⁴ CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: lxchen@yic.ac.cn.

PMID: 37660620
DOI: 10.1016/j.jhazmat.2023.132440

Abstract

To ensure real-time validity of the detection of unstable toxic environmental pollutants, such as dissolved sulfides, we developed a portable on-site rapid analysis instrument. Through novel design of the color sensor chip-based core sensing components and the conversion between color signal and absorbance by Lambert's law, the instrument showed great performance for rapid (within 3 min) and sensitive on-site detection of sulfides in the environment. It is easy to achieve user-friendly, sample in-answer out, one-stop operation due to the touch-screen-integrated user interface of the instrument's data terminal. The detection limit of this method is 2.24 μg/L, the linear operation range is 0-1000 μg/L, and the coefficient of determination is 0.999. This instrument has been successfully applied to the on-site determination of sulfides in the Yellow River Delta and the Yantai Guangdang River in China. The portable instrument showed excellent anti-interference, good stability, and simple operation, which showed great prospects for the on-site rapid analysis of unstable targets in the environment.

Keywords: Dissolved sulfide; On-site detection; Portable instrument; Rapid analysis.