 |
| Titel |
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 |
| VerfasserIn |
J. S. Craven, L. D. Yee, N. L. Ng, M. R. Canagaratna, C. L. Loza, K. A. Schilling, R. L. N. Yatavelli, J. A. Thornton, P. J. Ziemann, R. C. Flagan, J. H. Seinfeld |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 24 ; Nr. 12, no. 24 (2012-12-17), S.11795-11817 |
| Datensatznummer |
250011662
|
| Publikation (Nr.) |
 copernicus.org/acp-12-11795-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| 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-NOx 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. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|