次氯酸钠消毒剂中有效氯测定的不确定度评定

Uncertainty Assessment of Valid Chlorine Measurement in Sodium Hypochlorite Disinfectant

按照《次氯酸钠》(GB 19106—2013),采用硫代硫酸钠标准滴定溶液滴定法测定次氯酸钠消毒剂中有效氯的质量分数,找出有效氯的测定影响不确定度主要输入。本次评定的次氯酸钠消毒剂中有效氯的质量分数为10.42%±0.05%,结果确认了试样稀释和滴定是影响测定结果的最主要因素。

Based on the sodium hypochlorite(GB 19106—2013),levels of valid chlorine in sodium hypochlorite disinfectant were determined by sodium hyposulphite standard solution titration method,the main influence factors of valid chlorine measurement were found.The results that,the mass fraction of valid chlorine in sodium hypochlorite disinfectant was 10.42%±0.05%,the sample dilution and titration were the main influence factors.