ZHANGXiang-qiong,WANGYan-xin,LIUBo,et al.Hydrogen Peroxide Reduction and Potassium Dichromate Reverse Titration for Determination of Chlorate in Sodium Hypochlorite[J].China Water & Wastewater,2022,38(16):135-138.
Hydrogen Peroxide Reduction and Potassium Dichromate Reverse Titration for Determination of Chlorate in Sodium Hypochlorite
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第16期
Page:
135-138
Column:
Date of publication:
2022-08-17
- Abstract:
- There is a great risk of chlorate content exceeding the standard in the disinfection process of low concentration sodium hypochlorite in water plants. Therefore, content of chlorate in sodium hypochlorite and the ratio of chlorate to effective chlorine will become the focus of water enterprises in the future. However, there is no national standard or industrial standard for the determination of chlorate content in sodium hypochlorite at present, so the method of hydrogen peroxide reduction and potassium dichromate reverse titration for the determination of chlorate content in sodium hypochlorite disinfectant was established. The experimental conditions, such as the amount of hydrogen peroxide, saturated sodium carbonate solution and heating time, were optimized, and the chlorate contents in actual water samples and reference samples were determined. The relative standard deviation of the determination results was 1.0%-2.7%, the relative deviation of the reference samples was -1.0%-3.7%, and the recoveries of actual water samples were 95.5%-103.6%, which had no significant difference with the results determined by ion chromatography. The method is simple, economical, applicable and accurate, and can be applied for the determination of chlorate content in sodium hypochlorite disinfectant.
Last Update:
2022-08-17