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http://dx.doi.org/10.7842/kigas.2018.22.2.46

Development of 10 μmol/mol Hydrogen Sulfide Primary Standard Gas for Odor Measurements  

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))
Publication Information
Journal of the Korean Institute of Gas / v.22, no.2, 2018 , pp. 46-51 More about this Journal
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).
Keywords
hydrogen sulfide; certified reference material; consistency; adsorption; stability; uncertainty;
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