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| Titel |
Quantitative single-particle analysis with the Aerodyne aerosol mass spectrometer: development of a new classification algorithm and its application to field data |
| VerfasserIn |
F. Freutel, F. Drewnick, J. Schneider, T. Klimach, S. Borrmann |
| 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 ; 6, no. 11 ; Nr. 6, no. 11 (2013-11-19), S.3131-3145 |
| Datensatznummer |
250085110
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| Publikation (Nr.) |
 copernicus.org/amt-6-3131-2013.pdf |
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| Zusammenfassung |
| Single-particle mass spectrometry has proven a valuable tool for gaining
information on the mixing state of aerosol particles. With the Aerodyne
aerosol mass spectrometer (AMS) equipped with a light-scattering probe,
non-refractory components of submicron particles with diameters larger than
about 300 nm can even be quantified on a single-particle basis. Here, we
present a new method for the analysis of AMS single-particle mass spectra.
The developed algorithm classifies the particles according to their
components (e.g. sulphate, nitrate, different types of organics) and
simultaneously provides quantitative information about the composition of
the single particles. This classification algorithm was validated by
applying it to data acquired in laboratory experiments with particles of
known composition, and applied to field data acquired during the MEGAPOLI
summer campaign (July 2009) in Paris. As shown, it is not only possible to
directly measure the mixing state of atmospheric particles, but also to
directly observe repartitioning of semi-volatile species between gas and
particle phase during the course of the day. |
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