氦中氮气、二氧化碳和一氧化碳气体标准物质的研制  

Preparation of Gas Reference Material of Nitric,Carbon Dioxide and Carbon Monoxide in Helium

作　　者：代伟娜[1] 刘晓林[1] 董云峰[1] 韦桂欢[1] 闫云[1] 陈欢[1] 

机构地区：[1]中国船舶重工集团公司第七一八研究所,河北邯郸056027

出　　处：《低温与特气》2015年第5期32-37,共6页Low Temperature and Specialty Gases

摘　　要：采用称量法研制了氦中氮气、二氧化碳和一氧化碳气体标准物质,并用气相色谱法对其进行了均匀性考察和稳定性评价,结果表明该气体标准物质均匀性、稳定性良好,定值准确,量值可靠。浓度范围为：氮气1%~20%、二氧化碳1%~20%、一氧化碳1%~20%,扩展不确定度1.5%（k=2）,有效期为1 a,使用压力下限为0.5 MPa。The gas reference material of nitric , carbon dioxide and carbon monoxide in helium was prepared by weighing method, and gas chromatography was used to investigate its uniformity and stability .The results showed that the gas refer-ence material had good uniformity and stability .And the value was accurate and reliable.The concentration range was 1%~20%, the relative expanded uncertainty was 1.5%（k=2）, the validity period was one year and the using pressure low-er limit was 0.5MPa.

关 键 词：氮气 二氧化碳 一氧化碳 气体标准物质 不确定度 

分 类 号：TQ116.41[化学工程—无机化工]