注射重量法制备气体标准物质中液体称量的数学模型和不确定度评价  

Mathematical Model And Uncertainty Evaluation of Liquid Weighing During The Preparation of CRMS by Injection Gravimetric Method

作　　者：胡树国[1] 王德发[1] 韩桥[1] 张群[1] 

机构地区：[1]中国计量科学研究院,北京100013

出　　处：《低温与特气》2012年第4期31-34,共4页Low Temperature and Specialty Gases

摘　　要：由于操作简便和易于读数等优点,电子天平在气体标准物质制备过程中正逐步取代机械天平,成为称量的主要手段。根据ISO 6142中有关对气体称量的数学模型和不确定度的评价,建立了注射重量法制备气体标准物质中使用电子天平称量液体的数学模型,并对称量过程的不确定度进行了评价。Considering the convenience of operating and reading, electronic balance becomes the main means instead of mechanical balance during the preparation of CRMs increasingly. According to gas weighing in /SO 6142, mathematical model of liquid weighing during the preparation of CRMs by injection gravimetric method is founded and the uncertainty of weighing process is evaluated.

关 键 词：注射重量法 气体标准物质 电子天平 数学模型 不确定度评价 

分 类 号：TQ117[化学工程—无机化工]