Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Development of dimethyl disulfide gas CRM and stability test

다이메틸다이설파이드 가스 인증표준물질 개발 및 안정성 평가

  • Kim, Young-Doo (Division of Metrology for Quality Life Environmental Metrology Group, Korea Research Institute of Standards and Science(KRISS)) ;
  • Woo, Jin-Chun (Division of Metrology for Quality Life Environmental Metrology Group, Korea Research Institute of Standards and Science(KRISS)) ;
  • Bae, Hyun-Kil (Division of Metrology for Quality Life Environmental Metrology Group, Korea Research Institute of Standards and Science(KRISS))
  • 김용두 (한국표준과학연구원, 삶의질표준부) ;
  • 우진춘 (한국표준과학연구원, 삶의질표준부) ;
  • 배현길 (한국표준과학연구원, 삶의질표준부)
  • Received : 2006.10.25
  • Accepted : 2006.12.01
  • Published : 2006.12.28
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Abstract

A type of dimethyl disulfide gas CRM in the ppb level was developed for the analysis of tracelevel odorous gas in environmental atmosphere. The concentration of dimethyl disulfide($(CH_3)_2S_2$) was $10{\mu}mol/mol$ level in the cylinder filled with nitrogen, 1500 psi. And the variability of the concentration for 2 years was about 0.14% due to the adsorption or instability of $(CH_3)_2S_2$. The gas standards produced simultaneously in 4 bottles and examined by GC-FID were shown with 0.4%, reproducibility of preparation and 0.25%, standard uncertainty due to weighing and purity. The relative expended uncertainty of 1.1%(95% of confidence level, k=2) was assigned to the certified value of $10{\mu}mol/mol$ level of $(CH_3)_2S_2$ after quantitative evaluation on the purity, mixing, weighing, analysis, adsorption and stability of dimethyl sulfide gas.

환경 대기 중에 미량 농도로 존재하는 악취 물질의 측정을 위한 ppm 수준의 다이메틸다이설파이드($(CH_3)_2S_2$) 가스 인증표준물질(CRM)을 개발하였다. 이 표준가스는 $(CH_3)_2S_2$의 농도 수준이 $10{\mu}mol/mol$이고 질소압력이 1500 psi로서, 알루미늄 실린더에 제조되었고, 2년 동안에 0.14% 수준의 안정성을 보였다. 동시에 제조된 표준가스 실린더 4병의 $(CH_3)_2S_2$ 농도를 가스크로마토그래프-불꽃이온화검출기(GC-FID)로 비교하여 0.4% 수준의 제조 재현성과 0.25%의 중량 및 순도의 표준불확도를 확인하였다. 개발된 $(CH_3)_2S_2$ 표준가스의 인증값은 $10{\mu}mol/mol$ 수준이었고, 순도, 혼합. 제조, 분석, 흡착성 및 안정성을 모두 고려하여 결정한 인증값의 상대 확장불확도는 1.01%(95%의 신뢰수준, k=2)이었다.

Keywords

References

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