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Mechanisms for the formation of secondary organic aerosol components from the gas-phase ozonolysis of alpha-pinene

Ma, Y., Russell, A.T. and Marston, G. (2008) Mechanisms for the formation of secondary organic aerosol components from the gas-phase ozonolysis of alpha-pinene. Physical Chemistry Chemical Physics, 10 (29). pp. 4294-4312. ISSN 1463-9076

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To link to this article DOI: 10.1039/b803283a

Abstract/Summary

Gas-phase ozonolysis of alpha-pinene was studied in static chamber experiments under 'OH-free' conditions. A range of multifunctional products-in particular low-volatility carboxylic acids-were identified in the condensed phase using gas chromatography coupled to mass spectrometry after derivatisation. The dependence of product yields on reaction conditions (humidity, choice of OH radical scavengers, added Criegee intermediate scavengers, NO2 etc.) was investigated to probe the mechanisms of formation of these products; additional information was obtained by studying the ozonolysis of an enal and an enone derived from alpha-pinene. On the basis of experimental findings, previously suggested mechanisms were evaluated and detailed gas-phase mechanisms were developed to explain the observed product formation. Atmospheric implications of this work are discussed.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11445
Uncontrolled Keywords:IONIZATION MASS-SPECTROMETRY, OZONE-ALKENE REACTION, CIS-PINIC ACID, BETA-PINENE, OH RADICALS, PARTICULATE PRODUCTS, PARTICLE FORMATION, PHOTOOXIDATION PRODUCTS, ATMOSPHERIC PARTICLES, MONOTERPENE OXIDATION

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