cis-pinic acid, a possible precursor for organic aerosol formation from ozonolysis of α-pinene

A method for the analysis of carboxylic acids in aerosols was developed, based on the collection of particles on Teflon filters (2.5 cm diameter with a 0.4 μm pore size), extraction with dichloromethane, and derivatization with BF 3-methanol followed by analysis of the formed methylesters by large-v...

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Bibliographic Details
Published in:Atmospheric environment (1994) 1998-05, Vol.32 (10), p.1657-1661
Main Authors: Christoffersen, T.S, Hjorth, J, Horie, O, Jensen, N.R, Kotzias, D, Molander, L.L, Neeb, P, Ruppert, L, Winterhalter, R, Virkkula, A, Wirtz, K, Larsen, B.R
Format: Article
Language:English
Subjects:
dicarboxylic acids
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
Particles and aerosols
secondary organic aerosols (SOA)
terpenes
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Summary:A method for the analysis of carboxylic acids in aerosols was developed, based on the collection of particles on Teflon filters (2.5 cm diameter with a 0.4 μm pore size), extraction with dichloromethane, and derivatization with BF 3-methanol followed by analysis of the formed methylesters by large-volume injection GC/MS. In aerosol samples from smog chamber experiments with α-pinene and ozone, this method was applied and resulted in the identification for the first time of cis-pinic acid. Yields were in the range of 1-3% for 1000 pbbv α-pinene reacted with 750 pbbv ozone, and in in the range of 0.3-0.5% for 100 pbbv α-pinene reacted with 75 pbbv ozone. Being a dicarboxylic acid this product is estimated to possess an extremely low vapour pressure and may thus be an important element in gas-to-particle conversion of α-pinene.
ISSN:1352-2310
1873-2844
DOI:10.1016/S1352-2310(97)00448-2