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| Titel |
Gaseous and particulate products from the atmospheric OH-initiated oxidation of g-terpinene and d-limonene |
| VerfasserIn |
C. Rio, A. Gratien, K. Le Menach, P. M. Flaud, H. Budzinski, E. Villenave |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250028253
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| Zusammenfassung |
| The formation of secondary organic aerosol (SOA) is one of the research focuses in
atmospheric chemical process.
Monoterpenes, which are important constituents of biogenic non methanic organic
compound emissions, are the principal natural precursors of SOA. Indeed, their degradation
with atmospheric oxidants such as hydroxyl radicals, yields low volatility compounds which
readily form secondary organic aerosols.
In this work, we have mainly focused on SOA formation from (OH + monoterpene)
reactions. Indeed, (γ-terpinene + OH) and (d-limonene + OH) reactions have been studied at
atmospheric pressure, using laser photolysis coupled with UV absorption radical
detection. It has been observed in our experimental conditions that particles were
formed within a time scale of a few milliseconds after the laser shot generating
OH radicals. This could be recorded by observing the scattered light generated by
the particles and thus, the formation of particles could be easily monitored in real
time.
Resulting oxidation products, which have been formed during these reactions, were
trapped in dichloromethane and analyzed by gas chromatography coupled to mass
spectrometry. They will be presented and discussed. |
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