Title
Mass spectrometric characterization of isomeric terpenoic acids from the oxidation of <tex>$\alpha$</tex>-pinene, <tex>$\beta$</tex>-pinene, d-limonene, and <tex>$\Delta^{3}$</tex>-carene in fine forest aerosol Mass spectrometric characterization of isomeric terpenoic acids from the oxidation of <tex>$\alpha$</tex>-pinene, <tex>$\beta$</tex>-pinene, d-limonene, and <tex>$\Delta^{3}$</tex>-carene in fine forest aerosol
Author
Faculty/Department
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Publication type
article
Publication
Chichester ,
Subject
Chemistry
Pharmacology. Therapy
Source (journal)
Journal of mass spectrometry. - Chichester
Volume/pages
46(2011) :4 , p. 425-442
ISSN
1076-5174
ISI
000288913400012
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
In this study, we present liquid chromatographic and mass spectral data for predominant terpenoic acids formed through oxidation of α-pinene, β-pinene, d-limonene, and Δ3-carene that occur in fine forest aerosol from K-puszta, Hungary, a rural site with coniferous vegetation. Characterization of these secondary organic aerosol tracers in fine ambient aerosol is important because it allows one to gain information on monoterpene precursors and source processes such as oxidation and aging processes. The mass spectral data were obtained using electrospray ionization in the negative ion mode, accurate mass measurements, and linear ion trap tandem mass spectrometric experiments. Emphasis is given to the mass spectrometric differentiation of isobaric terpenoic acids, such as, e.g. the molecular weight (MW) 186 terpenoic acids, cis-pinic, cis-caric, homoterpenylic, ketolimononic, and limonic acids. Other targeted isobaric terpenoic acids are the MW 184 terpenoic acids, cis-pinonic and cis-caronic acids, and the MW 204 tricarboxylic acids, 3-methyl-1,2,3-butanetricarboxylic and 3-carboxyheptanedioic acids. Fragmentation pathways are proposed to provide a rational explanation for the observed isomeric differences and/or to support the suggested tentative structures. For the completeness of the data set, data obtained for recently reported lactone-containing terpenoic acids (i.e. terpenylic and terebic acids), related or isobaric compounds (i.e. norpinic acid, diaterpenylic acid acetate, and unknown MW 188 compounds) are also included, the rationale being that other groups working on this topic could use this data compilation as a reference.
E-info
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