Trace determination of disinfection by-products in drinking water by cyclic ion chromatography with large-volume direct injection

Haibao Zhu; Zheng Ruan; Han Wang; Danhua Liu; Hongfang Tang; Jiahong Wang

doi:10.1039/d3ra02471g

Trace determination of disinfection by-products in drinking water by cyclic ion chromatography with large-volume direct injection

RSC Adv. 2023 Jul 18;13(31):21550-21557. doi: 10.1039/d3ra02471g. eCollection 2023 Jul 12.

Authors

Haibao Zhu^{1

2}, Zheng Ruan¹, Han Wang¹, Danhua Liu¹, Hongfang Tang¹, Jiahong Wang³

Affiliations

¹ School of Public Health, Hangzhou Medical College Hangzhou Zhejiang 310013 P. R. China.
² Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology Hangzhou Zhejiang 310014 P. R. China.
³ Center of Safety Evaluation and Research, Hangzhou Medical College Hangzhou Zhejiang 310013 P. R. China 2020000283@hmc.edu.cn.

Abstract

A novel cyclic ion chromatography (IC) system was developed for the simultaneous determination of trace disinfection by-products (DBPs) in drinking water. Five DBPs (chlorite, bromate, chlorate, dichloroacetic acid, and trichloroacetic acid) were sensitively determined by large-volume direct injection, and the interferences of dominant inorganic anions present in water were eliminated online through the cyclic determination of the target analytes. Under optimized conditions, the obtained limits of detection (LODs) were in the range of 0.18-1.91 μg L^-1 based on a signal-to-noise ratio (S/N) of 3 and an injection volume of 1.0 mL. The RSDs for peak area and retention time were in the range of 0.13-1.03% and 1.24-4.29%, respectively. Satisfactory recoveries between 92.3% and 106.4% were obtained by adding three concentration gradients of standards to the drinking water samples. The proposed method has advantages such as high sensitivity, facile automation, and no sample pretreatment, and might be a promising approach for routine analysis.