作者：方正, 潘义, 江月军, 杨嘉伟, 李红霞, 聂巍
作者单位：中国测试技术研究院, 四川 成都 610021
关键词：称量相对标准不确定度; 二元混合气体; 多元混合气体; 气体标准物质; 称量法
摘要：
结合国际称量法制备气体标准物质的标准ISO 6142,提出以质量比较仪为称量工具,制备二元混合气体标准物质和多元混合气体标准物质的称量相对标准不确定度的评定方式。并以称量法制备10mol/mol氮中一氧化氮气体标准物质为例,比较两种方式的评定结果,表明所提出的两种不确定评定方式比国际标准ISO 6142中使用机械天平的称量相对标准不确定评定方式更为简便。
Study on evaluation methods for weighing relative standard uncertainty of gas reference materials prepared by weighing method
FANG Zheng, PAN Yi, JIANG Yue-jun, YANG Jia-wei, LI Hong-xia, NIE Wei
National Institute of Measurement and Testing Technology, Chengdu 610021, China
Abstract: The evaluation methods of weighing relative standard uncertainty of binary mixed gas reference and multi-component mixed gas reference prepared with quality comparator were discussed respectively according to the international standard ISO 6142. Taking 10μmol/mol nitric oxide in nitrogen gas reference material prepared by weighing as an example, the results of two evaluation methods showed that the two evaluation methods based on quality comparator which had been studied in this paper were simpler than the evaluation methods based on traditional mechanical balance suggested in ISO 6142.
Keywords: weighing relative standard uncertainty; binary mixed gas reference; multi-component mixed gas reference; gas reference materials; weighing method
2012, 38(6): 5-8,12 收稿日期: 2012-5-28;收到修改稿日期: 2012-7-19
基金项目: 四川省成果转化项目(2012CC0025);国家质检总局科技计划项目(2011QK397);四川省科技支撑计划项目(2010GZ0215)
作者简介: 方正(1963-),男,辽宁沈阳市人,研究员,主要从事标准物质制备方法及化学计量量值溯源体系研究工作。
参考文献
[1] 全浩,韩永志. 标准物质及其应用技术[M]. 北京:中国标准出版社,2003.
[2] 赵伟. 谈谈标准物质的应用[J]. 计量与测试技术,2007,
34(2):22-23.
[3] ISO 6142-2001 Gas analysis-Preparation of calibration gas mixtures-Gravimetric method[S].
[4] JJF 1135-2005化学分析测量不确定评定[S]. 北京:中国标准出版社,2005.
[5] JJF 1059-1999测量不确定度评定与表示[S]. 北京:中国标准出版社,1999.
[6] Rhoderick G C, Yen J H. Development of a NIST standard reference material containing thirty volatile organic compounds at 5 nmol/mol in nitrogen[J]. Analytical Chemistry,2006,78(9):3125-3132.
[7] 江月军,何丘,张毅. 氮中微量氧气气体标准物质的研制[J].中国测试技术,2007,33(5):35-38.
[8] 潘义,王彧婕,张丹,等. 称量法制备气体标准物质称量不确定度评定的简化方法[J]. 化学研究与应用,2010,22(5):656-659.
[9] Guide to the Expression of Uncertainty in Measurement[S]. 1993.
[10] 潘义,方正,杨嘉伟. 氮中二氧化氮气体标准物质的研制[J].化学研究与应用,2012,24(5):816-620.
[11] CNAS-GL06-2006分析化学中不确定度的评估指南[S].
[12] The Queen Mary University of London Website[EB/OL].http://www.chem.qmul.ac.uk/iupa/AtWt/.
