水质pH值测定新旧标准对比分析

Comparison between the New and Old Standards for Determination of pH Value

2020年11月26日,我国生态环境部发布了HJ 1147—2020《水质pH值的测定电极法》(新标准),并于2021年6月1日起实施,同时停止执行GB 6920—1986《水质pH值的测定玻璃电极法》(旧标准)。鉴于新旧标准存在诸多差异,对新旧标准进行了详细的对比,分析了新旧标准名称、适用范围、方法原理、样品保存、仪器校准、样品测定、结果表示、质量保证和质量控制等异同。同时提出远距离采样现场测定pH值以及严格遵守新标准质量控制规定等建议,为pH值检测的相关从业者提供参考。

At November 26,2020,HJ 1147—2020“Water quality-determination of pH-electrode method”(new standard)was published by Ministry of Ecology and Environment of the People’s Republic of China,and is implemented from June 1,2021.GB 6920—1986“Water quality-determination of pH value-glass electrode method”(old standard)was abolished at the same time.Because of the differences between the old and new standards,a detailed comparison was made.The differences were analyzed,such as the standards names,application ranges,method principles,sample preservation,measuring instruments,test procedures,result representation,quality assurance and control.It was suggested that remote sampling and pH value is measured in the field,and the quality control should be strictly adopted according to the new standard.It can provide a reference for the relevant practitioners to measure pH value.