Gas/particle partitioning of carbonyls in the photooxidation of isoprene and 1,3,5-trimethylbenzene

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dc.contributor.authorHealy, Robert M.
dc.contributor.authorWenger, John C.
dc.contributor.authorMetzger, Axel
dc.contributor.authorDuplissy, Jonathan
dc.contributor.authorKalberer, Markus
dc.contributor.authorDommen, Josef
dc.contributor.funderEuropean Commission
dc.date.accessioned2016-07-26T15:31:28Z
dc.date.available2016-07-26T15:31:28Z
dc.date.issued2008-06-26
dc.date.updated2014-06-06T14:26:11Z
dc.description.abstractA new denuder-filter sampling technique has been used to investigate the gas/particle partitioning behaviour of the carbonyl products from the photooxidation of isoprene and 1,3,5-trimethylbenzene. A series of experiments was performed in two atmospheric simulation chambers at atmospheric pressure and ambient temperature in the presence of NOx and at a relative humidity of approximately 50%. The denuder and filter were both coated with the derivatizing agent O-(2,3,4,5,6-pentafluorobenzyl)-hydroxylamine (PFBHA) to enable the efficient collection of gas- and particle-phase carbonyls respectively. The tubes and filters were extracted and carbonyls identified as their oxime derivatives by GC-MS. The carbonyl products identified in the experiments accounted for around 5% and 10% of the mass of secondary organic aerosol formed from the photooxidation of isoprene and 1,3,5-trimethylbenzene respectively. Experimental gas/particle partitioning coefficients were determined for a wide range of carbonyl products formed from the photooxidation of isoprene and 1,3,5-trimethylbenzene and compared with the theoretical values based on standard absorptive partitioning theory. Photooxidation products with a single carbonyl moiety were not observed in the particle phase, but dicarbonyls, and in particular, glyoxal and methylglyoxal, exhibited gas/particle partitioning coefficients several orders of magnitude higher than expected theoretically. These findings support the importance of heterogeneous and particle-phase chemical reactions for SOA formation and growth during the atmospheric degradation of anthropogenic and biogenic hydrocarbons.en
dc.description.sponsorshipEuropean Commission (Project EUROCHAMP, Contract Number RII3-CT-2004-505968; ACCENT “Access to Infrastructures” Programme)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationHealy, R.M., Wenger, J.C., Metzger, A., Duplissy, J., Kalberer, M. and Dommen, J. (2008) 'Gas/particle partitioning of carbonyls in the photooxidation of isoprene and 1,3,5-trimethylbenzene', Atmospheric Chemistry and Physics, 8(12), pp. 3215-3230. doi:10.5194/acp-8-3215-2008en
dc.identifier.doi10.5194/acp-8-3215-2008
dc.identifier.endpage3230en
dc.identifier.issn1680-7316
dc.identifier.issued12en
dc.identifier.journaltitleAtmospheric Chemistry and Physicsen
dc.identifier.startpage3215en
dc.identifier.urihttps://hdl.handle.net/10468/2941
dc.identifier.volume8en
dc.language.isoenen
dc.publisherCopernicus Publications on behalf of the European Geosciences Union (EGU)en
dc.relation.urihttp://www.atmos-chem-phys.net/8/3215/2008/
dc.rights© 2008, the Authors. This work is distributed under the Creative Commons Attribution 3.0 License.en
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en
dc.subjectAtmospheric modelingen
dc.subjectCarbonyl compounden
dc.subjectFilteren
dc.subjectGasen
dc.subjectIsopreneen
dc.subjectParticle motionen
dc.subjectPartition coefficienten
dc.subjectPartitioningen
dc.subjectPhotooxidationen
dc.subjectSamplingen
dc.titleGas/particle partitioning of carbonyls in the photooxidation of isoprene and 1,3,5-trimethylbenzeneen
dc.typeArticle (peer-reviewed)en
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