摘要
介绍pH计检定仪的4种期间核查方法:传递比较法、多台对比法、留样测量法、实验室间比对法。传递比较法能直接反应pH计检定仪的变化,适用于已建立pH计检定仪检定装置的单位;多台对比法与留样测量法方便、快捷,可操作性强,适合大多数单位进行pH计检定仪的期间核查;实验室间比对法对设备要求较低,但需要协调的单位较多,周期较长,费用较高,实用性差。
Four intermediate check methods applied to verificating meter for pH meters were introduced such as transfer comparison method,multi-set comparison method,sample retention measurement method and inter-laboratory comparison method.The transfer comparison method can directly reflect the change of verificating meter for pH meters and it is suitable for the units where verification device of verification meter for pH metesrs has been established;multi-set comparison method and sample retention measurement method are convenient,fast and practicable,and the methods are used for the intermediate check of verificating meter for pH meters in most units;the inter-laboratory comparison method has low equipment requirements,a few units are needed to cooperate with each other,several months have to be tooken and higher cost must be needed,and then it is not practical.
作者
贾会
许建军
吴佳益
赵芳芳
JIA Hui;XU Jianjun;WU Jiayi;Zhao Fangfang(Henan Province Institute of Metrology,Zhengzhou 450000,China)
出处
《化学分析计量》
CAS
2020年第1期108-111,共4页
Chemical Analysis And Meterage
基金
河南省科技攻关项目(182102311050)
关键词
pH计检定仪
酸度计
期间核查
期间核查标准
数字多用表
verificating meter for pH meters
pH meters
intermediate check
intermediate check standard
digital multimeter
