プロトン移動反応質量分析法による自動車排出ガス中の有害大気汚染物質オンラインリアルタイム測定の検討

概要

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Automobile exhaust is considered to be an important emission source of air pollutants; it is thought that measurements of Hazardous Air Pollutants (HAPs) concentrations are important for the reduction of HAPs in atmospheric environment. Proton Transfer Reaction/Mass Spectrometry (PTR/MS) has been applied for measurements of HAPs in the atmospheric environment, because of high sensitivity detection in real time. Then, PTR/MS was investigated concerning a possibility of being used for on-line-real-time measurement of the HAPs exhaust from automobiles. Gasoline was analyzed in combinations of GC and PTR/MS, and it was clearly shown that a few interference ions are generated from other compounds. Moreover, automotive exhaust concentration measurements become difficult due to a reduction of emission concentration, it is very important to know the availability that the sub ppb order compounds can be detected by PTR/MS.