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http://dx.doi.org/10.5012/jkcs.2020.64.6.327

Performance Evaluation of a Portable GC for Real-time Monitoring of Volatile Organic Compounds  

You, Dong-Wook (Department of Chemistry and Wonkwang Institute of Materials Science and Technology, Wonkwang University)
Seon, Yeong-Sik (Department of Chemistry and Wonkwang Institute of Materials Science and Technology, Wonkwang University)
Oh, Jun-Sik (Dyntem Corporation)
Yi, Bongyoon (Center for Scientific Instrumentation, Korea Basic Science Institute)
Kim, Hyun Sik (Center for Scientific Instrumentation, Korea Basic Science Institute)
Jung, Kwang-Woo (Department of Chemistry and Wonkwang Institute of Materials Science and Technology, Wonkwang University)
Publication Information
Journal of the Korean Chemical Society / v.64, no.6, 2020 , pp. 327-333 More about this Journal
Abstract
Performance of a portable GC that can be utilized for the real time determination of volatile organic compounds in air was evaluated. It employs purified/compressed ambient air as the carrier gas eliminating the need for high pressure gas tanks. The compact system with dimensions of 35 × 26 × 15 ㎤ and weight of 5 kg is powered by either a 24 V DC external adapter or battery pack. Chromatograms of the mixture sample including benzene, toluene, ethylbenzene, and oxylene at concentrations of 1 ppmv and 20 ppmv represent a good reproducibility: 3.79% and 0.48% relative standard deviations (RSDs) for peak area variations; 0.40% and 0.08% RSDs for retention times. The method detection limit was 0.09 ppmv. A 30 m long, 0.28 mm I.D. column operated at an optimal condition yielded a peak capacity of 61 with good resolution for a 10 min isothermal analysis. The relative standard deviations (RSD) of the peak area variations and retention times during consecutive measurements over 27 h were less than 2.4%RSD and 0.5%RSD, respectively. Thus, this instrument makes it suitable for continuous and field analysis of low-concentration VOC mixtures in the indoor/outdoor environment as well as the spillage accident of hazardous chemicals.
Keywords
Portable GC; Reproducibility; Detection limit; Resolution; Volatile organic compounds;
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