加熱脱着GC / MSによるディーゼル排気および大気中ナノ粒子の有機成分分析 Organic Analysis of Nanoparticles in Diesel Exhaust and the Atmosphere by Thermal Desorption-Gas Chromatography / Mass Spectrometry

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The sensitivity of thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) was greatly improved by replacing the thermal desorption unit and mass spectrometer and by applying the selected ion monitoring method. Quantification limits of 12 polycyclic aromatic hydrocarbons (PAHs) , 17α (H) , 21β (H) -hopane, and C<SUB>18</SUB>-C<SUB>36</SUB> <I>n</I>-alkanes were 4-17, 13, and 13-39 pg, respectively. For extremely small amount (≈ 20 μg) of standard reference materials (1649a, 1650b, and 2975) , PAH concentrations determined by TD-GC/MS agreed reasonably well with the certified values. TD-GC/MS was applied to size-resolved particles in diesel exhaust, and in roadside and background atmospheres. For diesel exhaust particles emitted under no-load condition, 17α (H) , 21β (H) -hopane concentrations per particle mass were higher in smaller particles, suggesting that lubricating oil was the major component of the nuclei-mode particles (particles with a modal diameter of 0.01-0.03 μm) . For the roadside and the background particles, 17α (H) , 21β (H) -hopane concentrations per particle mass were also higher in smaller particles after correction for evaporation of 17α (H) , 21β (H) -hopane in the atmosphere. The results suggest that nanoparticles (≤0.03 μm) in the roadside and the background atmospheres originated mainly from oil-rich nanoparticles in diesel exhaust, although a large proportion of their original components had evaporated.

収録刊行物

  • エアロゾル研究 = Journal of aerosol research  

    エアロゾル研究 = Journal of aerosol research 23(3), 163-171, 2008-09-20 

    日本エアロゾル学会

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各種コード

  • NII論文ID(NAID)
    10021919133
  • NII書誌ID(NCID)
    AN10041511
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    09122834
  • NDL 記事登録ID
    9654573
  • NDL 雑誌分類
    ZP5(科学技術--化学・化学工業--化学工学)
  • NDL 請求記号
    Z17-1062
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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