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A series of smog chamber experiments have been conducted in which five cyclic monoterpenes were oxidized by ozone. The evolved secondary aerosol was analysed by gas chromatography-mass spectroscopy (GC-MS) and high perfomance liquid chromatography-mass spectroscopy (HPLC-MS) for non-volatile polar oxidation products with emphasis on the identification of carboxylic acids. Three classes of compounds were determined at concentration levels which corresponded with the low percentage molar yields: dicarboxylic acids, oxo-carboxylic acids and hydroxy-keto-carboxylic acids. Carboxylic acids are highly par and have lower vapour pressures than their corresponding aldehydes and may thus play an in important role in secondary organic aerosol formation processes.

Additional information

Authors: GLASIUS M ET AL, JRC Ispra Environment Institute, Ispra (IT)
Bibliographic Reference: Article: Environmental Science and Technology, 34 (2000) pp 1001-1010
Record Number: 200012813 / Last updated on: 2000-11-03
Original language: en
Available languages: en