Title
Characterisation of tracers for aging of <tex>$\alpha$</tex>-pinene secondary organic aerosol using liquid chromatography/negative ion electrospray ionisation mass spectrometry Characterisation of tracers for aging of <tex>$\alpha$</tex>-pinene secondary organic aerosol using liquid chromatography/negative ion electrospray ionisation mass spectrometry
Author
Faculty/Department
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Publication type
article
Publication
London ,
Subject
Chemistry
Biology
Pharmacology. Therapy
Source (journal)
Environmental chemistry : a review of the literature published up to end ... / Liverpool School of Tropical Medicine. - London
Volume/pages
9(2012) :3 , p. 236-246
ISSN
0305-7712
ISI
000305832900007
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Secondary organic aerosol (SOA) from the oxidation of α-pinene is a very complex and dynamic mixture containing products with a different chemical nature and physicochemical properties that are dependent on chemical evolution or aging processes. In this study, we focus on the chemical characterisation of major products that are formed upon α-pinene ozonolysis SOA and subsequent aging through OH-initiated reactions in the absence of NOx, which include known as well as unknown tracers. The mass spectrometric data obtained for selected unknown compounds that show an increased relative abundance upon aging are interpreted in detail and tentative structures for them are proposed taking into account their formation through photooxidation of α-pinene. Known tracers for α-pinene SOA aging that were identified include norpinic acid, 10-hydroxypinonic acid, diaterpenylic acid acetate, and diesters formed by esterification of pinic acid with terpenylic acid or 10-hydroxypinonic acid. Novel tracers for α-pinene SOA aging that were tentatively identified include dinorpinic acid and 8-hydroxypinonic acid. In addition, reaction mechanisms are proposed to explain the formation of the observed α-pinene SOA tracers.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/6253ac/1e7ae57c.pdf
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