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http://dx.doi.org/10.5806/AST.2012.25.6.375

NMHCs measurement using a cryogenic concentration system and application on gas samples  

Kim, Su Ha (Science of Measurement, University of Science and Technology)
Moon, Dong Min (Center for Gas Analysis, Korea Research Institute of Standards and Science)
Kim, Jin Seog (Science of Measurement, University of Science and Technology)
Publication Information
Analytical Science and Technology / v.25, no.6, 2012 , pp. 375-381 More about this Journal
Abstract
In this study, we have developed a cryogenic concentration system for the analysis of non-methane hydrocarbons (NMHCs) in air sample. NMHCs with nmol/mol level of concentrations in the atmosphere were quantified by a comparative method with certified reference gas mixture. GC/FID with cryogenic concentration system operated in the range from $-67^{\circ}C$ to $180^{\circ}C$ was adopted. After cryogenic concentration, a fast desorption by heating could achieve a large amount of sample injection into the GC/FID. The linearity of the system was verified with the peak areas of NMHCs of the concentration amount of sample. The reproducibility is less than 10% and the limit of detection (LOD) is 0.1 nmol/mol. For the application of this system, we analyzed NMHCs in gas samples taken from air and soil in Daejeon, Seosan and Goheung.
Keywords
NMHCs; cryogenic pre-concentration; GC/FID;
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