PERSONAL DE APOYO
NAJERA juan jose
artículos
Título:
A comparison of infrared Spectroscopic methods for the study of heterogeneous reactions occurring on atmospheric aerosol proxies
Autor/es:
D.J. LAST; J.J. NAJERA; C.J. PERCIVAL; A.B. HORN
Revista:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Lugar: CAMBRIDGE; Año: 2009 vol. 11 p. 8214 - 8225
ISSN:
1463-9076
Resumen:
In this paper, the heterogeneous reaction between oleic acid and ozone has been studied using
infrared spectroscopy in two distinctly different experimental configurations. The effect of the
experiment on the observed products and rates of reaction is compared in order to derive a better
understanding of some of the variations in oleic acid reaction rates reported by a range of
researchers. One set of measurements is made using thin films of oleic acid in an attenuated total
internal reflection configuration, and it is shown that a treatment in which the ATR evanescent
wave is convolved with a moving reaction front is essential for the extraction of reliable kinetic
data. The results are compared to similar measurements in a recently developed aerosol flow tube
equipped with a cross-beam infrared spectroscopic probe. Rates of reaction in the aerosol phase
are observed to be approximately 10 times faster and possible reasons for this discussed.