Zhu Haibao, Ruan Zheng, Wang Han, Liu Danhua, Tang Hongfang, Wang Jiahong
School of Public Health, Hangzhou Medical College Hangzhou Zhejiang 310013 P. R. China.
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.
RSC Adv. 2023 Jul 18;13(31):21550-21557. doi: 10.1039/d3ra02471g. eCollection 2023 Jul 12.
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 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.
开发了一种新型的离子色谱（IC）系统，用于同时测定饮用水中的痕量消毒副产物（DBPs）。通过大体积直接进样灵敏地测定了五种消毒副产物（亚氯酸盐、溴酸盐、氯酸盐、二氯乙酸和三氯乙酸），并通过对目标分析物的循环测定在线消除了水中主要无机阴离子的干扰。在优化条件下，基于3的信噪比（S/N）和1.0 mL的进样体积，获得的检测限（LOD）在0.18 - 1.91 μg/L范围内。峰面积和保留时间的相对标准偏差（RSD）分别在0.13 - 1.03%和1.24 - 4.29%范围内。通过向饮用水样品中添加三个浓度梯度的标准品，获得了92.3%至106.4%的满意回收率。所提出的方法具有灵敏度高、易于自动化且无需样品预处理等优点，可能是一种有前途的常规分析方法。
