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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/24565

Title: Laboratory Aerosol Kinetics Studies of the Hydrolysis Reaction of N2O5 Using a Flow Tube Coupled to a New Chemical Ionization Mass Spectrometer
Authors: Escorcia, Egda Nadyr
Advisor: Abbatt, Jonathan P. D.
Department: Chemistry
Keywords: N2O5
CIMS
Chemical Ionization Mass Spectrometer
kinetics
aerosols
uptake coefficient
flow tube
hydrolysis
heterogeneous
NOx
ozone
ammonium bisulphate
secondary organic aerosols
SOA
Issue Date: 26-Jul-2010
Abstract: The hydrolysis reaction of N2O5 was investigated at room temperature on two aerosol types using a flow tube coupled to a newly built Chemical Ionization Mass Spectrometer (CIMS). This instrument was fully constructed and optimized during this research period, as well as employed to conduct one of two aerosol studies. The first examined the reaction on ammonium bisulphate aerosols using a new ion detection method, I-•N2O5 cluster formation, which proved to be highly advantageous over the common approach of dissociative charge transfer, yielding a sensitivity for I-•N2O5 of 0.024 Hz/pptv. The uptake coefficients at 30% and 50% relative humidity were 0.0067 ± 0.0002 and 0.0120 ±0.0014, respectively. The second study was performed using a different CIMS previously assembled in the laboratory. In this case, the reaction was investigated on secondary organic aerosols produced through the ozonolysis of α-pinene, and resulted in an uptake coefficient of 8.5x10-5 ± 7x10-6 at 0% relative humidity.
URI: http://hdl.handle.net/1807/24565
Appears in Collections:Master
Department of Chemistry - Master theses

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