摘要
采用重量法研制了0.100μmol/mol的痕量氮中一氧化氮气体标准物质,其扩展不确定度为10%。在稀释气纯度分析时,采用标准添加法对纯化后的高纯氮中一氧化氮进行了准确定值,解决了痕量气体标准物质定值的难题。在长期稳定性考察时发现,气瓶中痕量一氧化氮量值随时间逐渐降低,1年内量值变化范围在4%~8%之间,并根据此结果进行了因素分析。
Gas reference material of nitrogen monoxide in nitrogen at mole fractions of 0.100μmol/mol was developed by gravimetric method,the extended uncertainty was determined to be 10%.In the dilution gas purity analysis,the standard addition method was used to accurately determine the value of nitrogen monoxide in the purified high-purity nitrogen,which solved the problem of determining the value of trace gas reference materials.During the long-term stability inspection,it was found that the amount of trace nitric oxide in the gas cylinder decreased gradually with time,and the change range was 4%~8%within one year.Based on this result,factor analysis was conducted.
作者
胡树国
张体强
杨柳青
杜秋芳
王德发
HU Shu-guo;ZHANG Ti-qiang;YANG Liu-qing;DU Qiu-fang;WANG De-fa(National Institute of Metrology,Beijing 100029,China)
出处
《计量学报》
CSCD
北大核心
2023年第1期144-148,共5页
Acta Metrologica Sinica
基金
国家重点研发计划(2016YFF0201101)。
关键词
计量学
一氧化氮
气体标准物质
痕量
重量法
metrology
nitrogen monoxide
gas reference material
trace
gravimetric method
