Molecular composition of biogenic secondary organic aerosols using ultrahigh resolution mass spectrometry: comparing laboratory and field studies

Show simple item record Kourtchev, Ivan Fuller, S. J. Giorio, Chiara Healy, Robert M. Wilson, Eoin O'Connor, Ian P. Wenger, John C. McLeod, M. Aalto, Juho Ruuskanen, T. M. Maenhaut, Willy Jones, R. L. Venables, Dean S. Sodeau, John R. Kalberer, Markus 2014-03-03T12:22:17Z 2014-03-03T12:22:17Z 2013-11
dc.identifier.citation KOURTCHEV, I., FULLER, S. J., GIORIO, C., HEALY, R. M., WILSON, E., O'CONNOR, I. P., WENGER, J. C., MCLEOD, M., AALTO, J., RUUSKANEN, T. M., MAENHAUT, W., JONES, R., VENABLES, D. S., SODEAU, J. R., KULMALA, M. & KALBERER, M. 2013. Molecular composition of biogenic secondary organic aerosols using ultrahigh resolution mass spectrometry: comparing laboratory and field studies. Atmospheric Chemistry and Physics Discussions. 13, 29593-29627. en
dc.identifier.volume 13 en
dc.identifier.startpage 29593 en
dc.identifier.endpage 29627 en
dc.identifier.issn 1680-7375
dc.identifier.doi 10.5194/acpd-13-29593-2013
dc.description.abstract Numerous laboratory experiments have been performed in an attempt to mimic atmospheric secondary organic aerosol (SOA) formation. However, it is still unclear how close the aerosol particles generated in laboratory experiments resemble atmospheric SOA with respect to their detailed chemical composition. In this study, we generated SOA in a simulation chamber from the ozonolysis of α-pinene and a biogenic volatile organic compound (BVOC) mixture containing α- and β-pinene, Δ3-carene, and isoprene. The detailed molecular composition of laboratory-generated SOA was compared with that of background ambient aerosol collected at a boreal forest site (Hyytiälä, Finland) and an urban location (Cork, Ireland) using direct infusion nanoelectrospray ultrahigh resolution mass spectrometry. Kendrick Mass Defect and Van Krevelen approaches were used to identify and compare compound classes and distributions of the detected species. The laboratory-generated SOA contained a distinguishable group of dimers that was not observed in the ambient samples. The presence of dimers was found to be less pronounced in the SOA from the VOC mixtures when compared to the one component precursor system. The elemental composition of the compounds identified in the monomeric region from the ozonolysis of both α-pinene and VOC mixtures represented the ambient organic composition of particles collected at the boreal forest site reasonably well, with about 70% of common molecular formulae. In contrast, large differences were found between the laboratory-generated BVOC samples and the ambient urban sample. To our knowledge this is the first direct comparison of molecular composition of laboratory-generated SOA from BVOC mixtures and ambient samples. en
dc.description.sponsorship European Commission (Marie Curie Intra-European fellowship (project # 254319)); European Commission (project EUROCHAMP-2, contract number 228335); European Research Council (ERC starting grant 279405); Suomen Akatemia, Finland (Center of Excellence Program (project number 1118615)) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Copernicus Publications en
dc.rights © Author(s) 2013. CC Attribution 3.0 License. en
dc.rights.uri en
dc.subject Atmospheric secondary organic aerosol en
dc.subject Biogenic volatile organic compound en
dc.title Molecular composition of biogenic secondary organic aerosols using ultrahigh resolution mass spectrometry: comparing laboratory and field studies en
dc.type Article (non peer-reviewed) en
dc.internal.authorcontactother Dean Venables, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: en
dc.internal.availability Full text available en 2013-11-13T12:13:46Z
dc.description.version Published Version en
dc.internal.rssid 238316646
dc.contributor.funder European Commission
dc.contributor.funder European Research Council
dc.contributor.funder Academy of Finland
dc.description.status Not peer reviewed en
dc.identifier.journaltitle Atmospheric Chemistry and Physics Discussions en
dc.internal.copyrightchecked Yes !!CORA!! CC-BY licence. en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress en

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