Development of a Continuous Measurement System of Particulate Organic Nitrates

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Other Title
  • 粒子状有機硝酸連続測定装置の開発

Abstract

<p>We developed a continuous measurement system of particulate organic nitrates (PONs) based on thermal dissociation followed by a cavity attenuated phase shift spectroscopy (TD-CAPS) technique. The PONs and BG lines were set in this system. For the PONs line, ambient air is introduced into an activated carbon denuder to remove the ambient O3, NO2 and gaseous organic nitrates. The air from the denuder is introduced into a heated quartz tube at 360℃ for thermal decomposition of the PONs to NO2, then the NO2 concentration is measured using a CAPS technique. For the BG line, ambient air is passed through a filter to remove particles including PONs before being introduced into the activated carbon denuder. The Concentrations of PONs are obtained by subtracting the NO2 concentrations measured by the BG line from those by the PONs line. An activated carbon fiber sheet is used in the activated carbon denuder. Characterization of the activated carbon denuder was performed and the optimized denuder has a breakthrough time of more than a half year and a transmission efficiency of more than 90% for PONs. Continuous observations of PONs were made using the TD-CAPS instrument at Osaka Prefecture University. This result demonstrates the performance of this instrument for PONs measurements.</p>

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Details 詳細情報について

  • CRID
    1390001277391578624
  • NII Article ID
    130007743083
  • DOI
    10.11298/taiki.54.195
  • ISSN
    21854335
    13414178
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Disallowed

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