Asian Journal of Atmospheric Environment

Korean Society for Atmospheric Environment (한국대기환경학회)
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Application of a Gas Chromatography/Luminol Detection System for Peroxyacetyl Nitrate Airborne Measurement

  • Khang, Bumju (Centennial Technology Co.) ;
  • Ahn, Joon Young (Climate & Air Quality Research Department, National Institute of Environmental Research) ;
  • Song, Dasol (Hankuk University of Foreign Studies, Department of Environmental Sciences) ;
  • Lee, Gangwoong (Hankuk University of Foreign Studies, Department of Environmental Sciences)
  • Received : 2013.03.14
  • Accepted : 2013.05.29
  • Published : 2013.06.30
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Abstract

We constructed and tested an airborne peroxyacetyl nitrate (PAN) monitoring system based on luminol chemiluminescence detection with fast gas chromatography. This system allowed for simultaneous measurement of PAN and nitrogen dioxide ($NO_2$) with a time resolution of <2 min. Actual sample masses within the fixed volume sample loop at various altitudes and temperatures were adjusted to standard atmosphere, using measured pressures and temperatures. The airborne PAN measurement system was evaluated during two field studies above the southern Korean Peninsula in August and October 2009. The detection limit based on the ISO approach was 0.035 ppbv PAN, well below the observed concentrations of 0.185-1.49 ppbv during these studies. Under these conditions, the PAN mixing ratios were positively correlated with $O_x$ ($O_x=O_3+NO_2$), with slopes varying between 0.014 and 0.033 and intercepts between 22.6 and 55.1 ppbv $O_x$. The intercepts corresponded roughly to background $O_x$ mixing ratios in central Europe; however, the slopes were above the range of slopes reported in other studies. We also enhanced the durability, safety, and ease of maintenance of the PAN monitoring system by redesigning the structure of the conventional luminol cell.

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References

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