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This article describes a method for the analysis of carboxylic acids in aerosols based on the collection of particles on Teflon filters (2.5 cm diameter with a 0.4 µm pore size), extraction with dischloromethane, and derivatation with BF(3)-methanol followed by analysis of the formed methylesters by large volume injection gas chromatography/mass spectrometry (GC/MS). In aerosol samples from smog chamber experiments with alpha-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 between 1% and 3% for 1000 pbbv alpha-pinene reacted with 750 pbbv ozone, and in the range of between 0.3% and 0.5% for 100 pbbv alpha-pinene reacted with 75 pbbv ozone. Being a dicarboxylic acid this product is estimated to posess an extremely low vapour pressure and may thus be an important element in gas-to-particle conversion of alpha-pinene.

Additional information

Authors: CHRISTOFFERSEN T S ET AL, JRC Ispra (IT);HORIE O ET AL, MPI für Chemie, Atmospheric Chemistry Division, Mainz (DE);RUPPERT L, Bergische Universität, Physikalische Chemie, Wuppertal (DE);WIRTZ K, Centro de Estudios Ambientales del Mediterraneo, Valencia (ES)
Bibliographic Reference: Article: Atmospheric Environment (1997)
Record Number: 199711548 / Last updated on: 1997-12-09
Original language: en
Available languages: en
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