Development of reference material for analysis of residual chlorine in water
MA Xiaoshuang1, GAO Guowei2, CHENG Jie2, LIU Tao1, SUN Zijie1, XING Xiaoru*1
1. Institute for Environmental Reference Materials, Environmental Development Center of the Ministry of Ecology and Environment, State Environmental Protection Key Laboratory of Pollutant Metrology and Reference Materials Research, Beijing 100029, China; 2. China National Environmental Centre, Beijing 100012, China
Abstract：Chlorine-containing disinfectants are widely used in the sanitizing of municipal water and polluted water. Too high or too low content of residual chlorine in water can cause health risk, and residual chlorine has been listed as one of the important indicators for water quality monitoring. In order to meet the requirements of residual chlorine reference material for water monitoring, the analytical methods of residual chlorine in water with different quality were compared. The reference material of residual chlorine for the analysis of water quality was developed by selecting permanganate as the standard reagent. The results showed that the developed residual chlorine reference materials had good uniformity and could be stably kept for 24 months under dark conditions. The certified values by several laboratories were reliable. The mass concentration and expanded uncertainty of two residual chlorine reference materials were (0.289±0.014) mg/L and (4.03±0.22) mg/L, respectively, which could meet the requirements of use.
马小爽, 高国伟, 程洁, 刘涛, 孙自杰, 邢小茹. 水质余氯分析标准样品的研制[J]. 冶金分析, 2023, 43(5): 67-73.
MA Xiaoshuang, GAO Guowei, CHENG Jie, LIU Tao, SUN Zijie, XING Xiaoru. Development of reference material for analysis of residual chlorine in water. , 2023, 43(5): 67-73.
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