Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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Development of 10 μmol/mol Hydrogen Sulfide Primary Standard Gas for Odor Measurements

악취측정용 10 μmol/mol 황화수소 표준가스 개발

  • Kim, Yong-Doo (Center for Gas Analysis, Korea Research Institute of Standards and Scence (KRISS)) ;
  • Bae, Hyun-Kil (Center for Gas Analysis, Korea Research Institute of Standards and Scence (KRISS)) ;
  • Kim, Dalho (Center for Gas Analysis, Korea Research Institute of Standards and Scence (KRISS)) ;
  • Oh, Sang-Hyub (Center for Gas Analysis, Korea Research Institute of Standards and Scence (KRISS)) ;
  • Lee, Jin Hong (Department of Environmental Engineering, Chungnam National University) ;
  • Lee, Sangil (Center for Gas Analysis, Korea Research Institute of Standards and Scence (KRISS))
  • 김용두 (한국표준과학연구원 화학의료표준본부) ;
  • 배현길 (한국표준과학연구원 화학의료표준본부) ;
  • 김달호 (한국표준과학연구원 화학의료표준본부) ;
  • 오상협 (한국표준과학연구원 화학의료표준본부) ;
  • 이진홍 (충남대학교) ;
  • 이상일 (한국표준과학연구원 화학의료표준본부)
  • Received : 2017.12.21
  • Accepted : 2018.04.06
  • Published : 2018.04.30
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Abstract

Hydrogen sulfide from landfill and sewage treatment plant is a major odor component and causes many civil petitions. Rapidly developing industries release hydrogen sulfide, an odorous gas, to the atmosphere. This study aims to develop a $10{\mu}mol/mol$ concentration level hydrogen sulfide primary standard gas for odor measurement. The hydrogen sulfide gas was prepared at a nominal concentration of $10{\mu}mol/mol$ in nitrogen using the gravimetric method described in ISO 6142. Replicate standard gases were produced in 4 aluminium cylinders, and their concentrations were verified by GC-AED. The uncertainty of production was less than 0.50 %, and the variation of the 4 replicates was 0.22 %. The wall adsorption of hydrogen sulfide in cylinders was 0.10 % at 1500 psi, and the concentration was estimated to be long-term stable for one year. The relative expanded uncertainty of the preparation consistency, adsorption and long-term stability of this hydrogen sulfide standard gas was less than 1.05 % (95 % of confidence level, k=2).

산업이 급속하게 발전함에 따라 자연 대기에서 악취를 유발하는 매우 적은 양의 황화수소가 존재합니다. 매립 및 하폐수처리장에서 나오는 황화수소 성분은 대기에 존재하므로 많은 민원이 발생됩니다. 민원이 발생하는 악취가스를 측정하기 위해 $10{\mu}mol/mol$ 농도 수준의 황화수소 인증표준물질(Certified reference material)을 개발하고자 하였다. 질소 안에 $10{\mu}mol/mol$ 수준의 황화수소 가스 제조는 ISO 6142에 의한 중량법을 사용하였다. 4 개의 알루미늄 실린더에 가스 CRM을 제조하고 GC-AED로 그 농도를 확인했습니다. 제조의 불확도는 0.50 % 미만이었고, 제조일치성은 0.22 %이었다. 실린더의 내부 흡착은 1500 psi에서 0.10 %이었고 1 년 동안 장기간 안정한 것으로 평가되었다. 이 황화수소 CRM의 제조 일치성, 실린더의 흡착 및 장기 안정성에 대한 상대 확장불확도는 1.05 %(신뢰도 95 %, k = 2) 이내로 개발되었다.

Keywords

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