title: Comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry in the identification of organic compounds in atmospheric aerosols from coniferous forest.
abstract: Comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC x GC-TOF-MS) was applied in the identification of organic compounds in atmospheric aerosols from coniferous forest. The samples were collected at Hyytiälä, Finland, as part of the QUEST campaign, in Spring 2003. Manual and automated search procedures were compared in the identification. An automated procedure is preferable when a large number of data files need to be processed; but manual search was more accurate with the present samples, where the number of compounds was large and most of the compounds of interest were present at trace level. Altogether, about 50 compounds were identified on the basis of mass spectra and linear retention indices. The identified compounds included oxidised monoterpenes, acyclic alkanes, alkenes, ketones and aldehydes, as well as a few alcohols, acids, and aromatic compounds.
authors.affiliation: Laboratory of Analytical Chemistry, Department of Chemistry, PO Box 55, FIN-00014 University of Helsinki, Finland.
authors.forename: Minna
authors.initials: M
authors.lastname: Kallio
authors.forename: Matti
authors.initials: M
authors.lastname: Jussila
authors.forename: Taija
authors.initials: T
authors.lastname: Rissanen
authors.forename: Piia
authors.initials: P
authors.lastname: Anttila
authors.forename: Kari
authors.initials: K
authors.lastname: Hartonen
authors.forename: Anni
authors.initials: A
authors.lastname: Reissell
authors.forename: René
authors.initials: R
authors.lastname: Vreuls
authors.forename: Mohamed
authors.initials: M
authors.lastname: Adahchour
authors.forename: Tuulia
authors.initials: T
authors.lastname: Hyötyläinen
mesh_terms: D000336:Aerosols / Q000737:chemistry*; D001272:Atmosphere / Q000737:chemistry*; D001331:Automation; D052176:Azulenes; D002849:Chromatography, Gas / Q000379:methods*; D005387:Finland; D005410:Flame Ionization; D006844:Hydrocarbons, Cyclic / Q000032:analysis*; D013058:Mass Spectrometry; D012717:Sesquiterpenes; D013729:Terpenes / Q000737:chemistry; D064028:Tracheophyta / Q000737:chemistry*; D014197:Trees / Q000378:metabolism*
chemical_list: D000336:Aerosols; D052176:Azulenes; D006844:Hydrocarbons, Cyclic; D012717:Sesquiterpenes; D013729:Terpenes; C419726:alloaromadendrene