To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Impact of humidity on the… - University of Gothenburg, Sweden Till startsida
To content Read more about how we use cookies on

Impact of humidity on the ozone initiated oxidation of limonene, delta3-carene, and alpha-pinene.

Journal article
Authors Åsa M. Jonsson
Mattias Hallquist
Evert Ljungström
Published in Environmental science & technology
Volume 40
Issue 1
Pages 188-94
ISSN 0013-936X
Publication year 2006
Published at Department of Chemistry
Pages 188-94
Language en
Keywords Air Pollutants, chemistry, Cyclohexenes, Humidity, Monoterpenes, chemistry, Oxidation-Reduction, Ozone, chemistry, Terpenes, chemistry, Water, chemistry
Subject categories Chemical Sciences


The effect of water on the initial secondary organic aerosol (SOA) formation from gas-phase ozonolysis of limonene, delta3-carene, and alpha-pinene (-3 and approximately 1.5 x 10(11) molecule cm(-3) reacted) has been investigated in a flow reactor at controlled relative humidity (RH), temperature (298 +/- 0.4 K), and reaction time (270 +/- 2 s). Low amounts of terpene converted minimize the impact of secondary reactions. A comparison of the SOA formation from the three terpenes was made for initial rate of reactions being around 7.5 x 10(8) and 15 x 10(8) molecule cm(-3) s(-1). The most efficient species in producing SOA was limonene, while alpha-pinene was the least efficient. The results showed that an enhancement in water vapor concentration (<2-85% RH) caused an increase in both integrated mass (M10-300nm) and total number (N10-300nm). The effect on number and mass were a factor of 2-3 and 4-8, respectively. Physical water up-take can partly explain the increase in mass, but not the observed increase in number. Therefore it was concluded that the increase in water concentration must, by a gas-phase reaction, produce more low volatility product(s).

Page Manager: Webmaster|Last update: 9/11/2012

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?