Acta Metrologica Sinica  2021, Vol. 42 Issue (1): 123-128    DOI: 10.3969/j.issn.1000-1158.2021.01.20
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Research on Gas Reference Material of C4F7N in Carbon Dioxide
WANG De-fa1,ZHANG Ti-qiang1,HAN Qiao1,LIU Zhi-yong1,WANG Yan-wu2,YAN Xiang-lian3
1. National Institute of Metrology, Beijing 100029, China
2. Henan Relations Co. Ltd., Zhengzhou, Henan 450001, China
3. China Electric Power Research Institute, Beijing 100192, China
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Abstract  Research on gas reference material of C4F7N in carbon dioxide was reported. The gas mixture was prepared by filling pure C4F7N and carbon dioxide into cylinder. The certified value was from gravimetric method. The impurities in parent gas were determined. The long-term stability of this reference material was evaluated by both classical stability study and isochronous stability study. Results showed it had good stability in six month. The relative expanded uncertainty is 0.5% (k=2) for the mole fraction from 1% mol/mol to 30% mol/mol.
Key wordsmetrology      C4F7N;gas reference material;gravimetric method;uncertainty     
Received: 12 February 2019      Published: 19 January 2021
PACS:  TB99  
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WANG De-fa
ZHANG Ti-qiang
HAN Qiao
LIU Zhi-yong
WANG Yan-wu
YAN Xiang-lian
Cite this article:   
WANG De-fa,ZHANG Ti-qiang,HAN Qiao, et al. Research on Gas Reference Material of C4F7N in Carbon Dioxide[J]. Acta Metrologica Sinica, 2021, 42(1): 123-128.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.01.20     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I1/123
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