高精密恒电流库仑法测定CCQM-K73国际关键比对盐酸溶液中H+含量  

Determination of content of H+ in hydrochloride acid for CCQM-K73 international key comparison by high precision constant current coulometry

作　　者：吴冰[1] 马联弟[1] 王茜[1] 

机构地区：[1]中国计量科学研究院,北京100013

出　　处：《分析试验室》2013年第6期86-89,共4页Chinese Journal of Analysis Laboratory

摘　　要：采用高精密恒电流库仑法测量了CCQM-K73国际比对样品盐酸溶液含量。该方法是国际上公认的基准测量方法,根据法拉第电解定律,通过质量、电阻、电动势、时间等基本物理量及法拉第常数来进行样品的测定,直接溯源到国际SI单位,不需要用标准物质进行比对。中国计量科学研究院作为国家化学计量最高溯源,参加了该项关键比对,并取得了等效一致的好成绩。The content of H＋ in hydrochloride acid for CCQM-K73 international key comparison was determined by high precision constant current coulometry. The method as a primary method is recognized in international. It was based on Faraday＇s law of electrolysis and was successfully used to determine purity of samples. The measuring results depended directly on the reliability of measuring physical quantities （mass, resister, voltage, time） and fundamental constants expressed in SI units, and the measurement did not need a reference material for comparison. National Institute of Metrology （NIM） took part in the key comparison as the top of the national chemistry metrology traceability and received very good results published by CCQM.

关 键 词：高精密恒电流库仑法 基准测量方法 国际关键比对 盐酸 

分 类 号：O657.1[理学—分析化学]