Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
권호 표지

Development of dimethyl sulfide gas CRM and stability test

다이메틸설파이드 가스 인증표준물질 개발 및 안정성 평가

  • Kim, Young-Doo (Division of Chemical Metrology and Materials Evaluation, Korea Research Institute of Standards and Science(KRISS)) ;
  • Heo, Gwi-Suk (Division of Chemical Metrology and Materials Evaluation, Korea Research Institute of Standards and Science(KRISS)) ;
  • Oh, Sang-Hyub (Division of Chemical Metrology and Materials Evaluation, Korea Research Institute of Standards and Science(KRISS)) ;
  • Kim, Byoung-Moon (Division of Chemical Metrology and Materials Evaluation, Korea Research Institute of Standards and Science(KRISS)) ;
  • Bae, Hyun-Kil (Division of Chemical Metrology and Materials Evaluation, Korea Research Institute of Standards and Science(KRISS)) ;
  • Woo, Jin-Chun (Division of Chemical Metrology and Materials Evaluation, Korea Research Institute of Standards and Science(KRISS))
  • 김용두 (한국표준과학연구원, 물질량표준부) ;
  • 허귀석 (한국표준과학연구원, 물질량표준부) ;
  • 오상협 (한국표준과학연구원, 물질량표준부) ;
  • 김병문 (한국표준과학연구원, 물질량표준부) ;
  • 배현길 (한국표준과학연구원, 물질량표준부) ;
  • 우진춘 (한국표준과학연구원, 물질량표준부)
  • Received : 2005.09.21
  • Accepted : 2005.10.24
  • Published : 2005.12.26
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Abstract

A type of dimethyl sulfide gas CRM in the ppb level was developed for the analysis of trace-level odorous gas in environmental atmosphere. The concentration of dimethyl sulfide ($(CH_3)_2S$) was 10 umol/mol level in the cylinder filled with nitrogen, 1500 psi. And the variability of the concentration for 3 years was about 0.1% due to the adsorption or instability of $(CH_3)_2S$. 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 umol/mol level of $(CH_3)_2S$ 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 다이메틸설파이드($(CH_3)_2S$) 가스 인증표준물질(CRM)을 개발하였다. 이 표준가스는 $(CH_3)_2S$의 농도 수준이 10 umol/mol이고 질소압력이 1500 psi로서, 알루미늄 실린더에 제조되었고, 3년 동안에 0.2% 수준의 안정성을 보였다. 동시에 제조된 표준가스 실린더 4병의 $(CH_3)_2S$ 농도를 가스크로마토그래프-불꽃이온화검출기(GC-FID)로 비교하여 0.4% 수준의 제조 재현성과 0.25%의 중량 및 순도의 표준불확도를 확인하였다. 개발된 $(CH_3)_2S$표준가스의 인증값은 10 umol/mol 수준이었고, 순도, 혼합. 제조, 분석, 흡착성 및 안정성을 모두 고려하여 결정한 인증값의 상대 확장불확도는 1.1%(95%의 신뢰수준, k=2)이었다.

Keywords

References

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