Analysis of secondary organic aerosol formation and aging using positive matrix factorization of high-resolution aerosol mass spectra: application to the dodecane low-NO_x system
Abstract
Positive matrix factorization (PMF) of high-resolution laboratory chamber aerosol mass spectra is applied for the first time, the results of which are consistent with molecular level MOVI-HRToF-CIMS aerosol-phase and CIMS gas-phase measurements. Secondary organic aerosol was generated by photooxidation of dodecane under low-NOx conditions in the Caltech environmental chamber. The PMF results exhibit three factors representing a combination of gas-particle partitioning, chemical conversion in the aerosol, and wall deposition. The slope of the measured high-resolution aerosol mass spectrometer (HR-ToF-AMS) composition data on a Van Krevelen diagram is consistent with that of other low-NO_x alkane systems in the same O : C range. Elemental analysis of the PMF factor mass spectral profiles elucidates the combinations of functionality that contribute to the slope on the Van Krevelen diagram.
Additional Information
© 2012 Author(s). This work is distributed under the Creative Commons Attribution 3.0 License. Published by Copernicus Publications on behalf of the European Geosciences Union. Received: 7 June 2012; Published in Atmos. Chem. Phys. Discuss.: 6 July 2012; Revised: 26 October 2012; Accepted: 4 December 2012; Published: 17 December 2012. This work was supported by US Department of Energy grant DE-SC 000 6626. Analysis of the MOVI-HRToFCIMS data is supported by a grant to J. A. T. from the US Department of Energy (DOE-ER65318).Attached Files
Published - acp-12-11795-2012.pdf
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Additional details
- Alternative title
- Analysis of secondary organic aerosol formation and aging using positive matrix factorization of high-resolution aerosol mass spectra: application to the dodecane low-NOx system
- Eprint ID
- 36555
- Resolver ID
- CaltechAUTHORS:20130124-083937535
- DE-SC0006626
- Department of Energy (DOE)
- DOE-ER65318
- Department of Energy (DOE)
- Created
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2013-01-24Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field