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논문 기본 정보

자료유형
학술저널
저자정보
Byung Soo Ahn (Korea Research Institute of Standards and Science) Dong Min Moon (Korea Research Institute of Standards and Science) Jin Bok Lee (Korea Research Institute of Standards and Science) Jin Seog Kim (Korea Research Institute of Standards and Science) Jin-Hong Lee (Chungnam National University) Kiryong Hong (Korea Research Institute of Standards and Science)
저널정보
한국분석과학회 분석과학 분석과학 제33권 제2호
발행연도
2020.4
수록면
68 - 75 (8page)

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초록· 키워드

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We have developed 10 μmol/mol nitrogen and oxygen certified reference materials (CRMs) in helium, as a SI-traceable gas standard for a quantifying of impurities in pure gases for the first time in Korea. The standard gas mixtures of nitrogen and oxygen were prepared in 5000 μmol/mol and sequentially were diluted to 250 μmol/mol and 10 μmol/mol according to the gravimetric preparation. In each dilution step, two cylinders of CRMs were prepared. The verification of internal consistency among the prepared gas mixtures was performed by using GC-TCD. The amount fractions and those expanded uncertainties (k = 2) of nitrogen and oxygen in the standard gas mixtures were (10.12 ± 0.08) μmol/mol and (10.18 ± 0.08) μmol/mol for nitrogen, and (9.88 ± 0.06) μmol/mol and (9.94 ± 0.06) μmol/mol for oxygen, respectively. We have conducted a purity assessment of two commercial helium gases using developed CRMs. As the results of the purity assessment, nitrogen and oxygen were detected by (1.66 ± 0.03) μmol/mol and (0.31 ± 0.02) μmol/mol, respectively, as the impurities in one of the pure helium.

목차

Abstract
1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
References

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UCI(KEPA) : I410-ECN-0101-2020-433-000508575