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Poster Presentations
Day 3, June 24（Tue.）
Room P (Maesato East, Foyer, Ocean Wing)
- 3P-PM-32
Fragmentation analysis of gas-phase oxidation products from several monoterpenes using high-resolution collision-induced dissociation mass spectrometry (HR-CID-MS)
(Yokohama City Univ.)
oDaisuke Fukuyama, Kanako Sekimoto
Monoterpenes are emitted into the atmosphere from forest areas as secondary metabolites of plants and urban areas as fragrance ingredients in personal care products. They are unsaturated hydrocarbons with several structural isomers and are highly reactive with ozone, hydroxyl radicals, and NO3 radicals in the atmosphere. These reactions produce many types of oxidation products with multiple functional groups. Various oxidation products can be formed secondary organic aerosols (SOAs), one of the particle matters (e.g., PM.2.5). SOAs have been reported to affect the global warming and climate change and to harm human health. The SOA formation efficiencies depend on the volatility of oxidation products, in other words, on the elemental compositions and functional groups of monoterpene oxidation products. However, many oxidation products have not been identified experimentally. In this study, to investigate oxidation products comprehensively, we performed experiments using atmospheric pressure corona discharge ionization (APCDI), like an atmospheric pressure chemical ionization (APCI) and collision-induced dissociation (CID) methods with Q-Orbitrap MS without chromatography. We found that the relationship between functional groups and specific fragmentation pattern in CID using standards of monoterpene oxidation products. Based on these relationships, we estimated the functional groups of various oxidation products originating from nine different monoterpenes.