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| Titel |
Vapor pressures of substituted polycarboxylic acids are much lower than previously reported |
| VerfasserIn |
A. J. Huisman, U. K. Krieger, A. Zuend, C. Marcolli, T. Peter |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 13 ; Nr. 13, no. 13 (2013-07-12), S.6647-6662 |
| Datensatznummer |
250018759
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| Publikation (Nr.) |
 copernicus.org/acp-13-6647-2013.pdf |
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| Zusammenfassung |
| The partitioning of compounds between the aerosol and gas phase is
a primary focus in the study of the formation and fate of secondary
organic aerosol. We present measurements of the vapor pressure of
2-methylmalonic (isosuccinic) acid, 2-hydroxymalonic (tartronic) acid,
2-methylglutaric acid, 3-hydroxy-3-carboxy-glutaric (citric) acid and
DL-2,3-dihydroxysuccinic (DL-tartaric) acid, which were obtained from the
evaporation rate of supersaturated liquid particles levitated in an
electrodynamic balance. Our measurements indicate that the pure
component liquid vapor pressures at 298.15 K for tartronic,
citric and tartaric acids are much lower than the same quantity that
was derived from solid state measurements in the only other room
temperature measurement of these materials (made by Booth
et al., 2010). This strongly suggests that empirical correction
terms in a recent vapor pressure estimation model to account for the
inexplicably high vapor pressures of these and similar compounds
should be revisited, and that due caution should be used when the
estimated vapor pressures of these and similar compounds are used as
inputs for other studies. |
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