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| Titel |
Elemental analysis of aerosol organic nitrates with electron ionization high-resolution mass spectrometry |
| VerfasserIn |
A. W. Rollins, J. L. Fry, J. F. Hunter, J. H. Kroll, D. R. Worsnop, S. W. Singaram, R. C. Cohen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 3, no. 1 ; Nr. 3, no. 1 (2010-02-26), S.301-310 |
| Datensatznummer |
250000830
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| Publikation (Nr.) |
 copernicus.org/amt-3-301-2010.pdf |
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| Zusammenfassung |
| Four hydroxynitrates (R(OH)R'ONO2) representative of atmospheric
volatile organic compound (VOC) oxidation products were synthesized,
nebulized and sampled into an Aerodyne High Resolution Time of Flight
Aerosol Mass Spectrometer (HR-ToF-AMS). The resulting mass spectrum
was used to evaluate calibration factors for elemental analysis of
organic nitrates by AMS, and to determine the distribution of nitrogen
in the detected fragments in a search for an AMS signature of organic
nitrates. We found that 30% of the detected nitrogen mass is in the
NO+ and NO2+ fragments, 12% at NHx+ fragments,
5% at CxHyOzN+
fragments, and 53% at various CxHyN+
fragments. Elemental analysis indicated that nitrogen was detected
with higher efficiency than carbon and hydrogen, but oxygen was
detected with reduced efficiency compared to previously reported
results for a suite of organics which did not include organic
nitrates. The results are used to suggest the maximum corrections to
ambient O:C and N:C ratios based on AMS measurements. |
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