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Vapor pressures of substituted polycarboxylic acids are much lower than previously reported

Huisman, A. J. and Krieger, U. K. and Zuend, A. and Marcolli, C. and Peter, T. (2013) Vapor pressures of substituted polycarboxylic acids are much lower than previously reported. Atmospheric Chemistry and Physics, 13 (13). pp. 6647-6662. ISSN 1680-7316.

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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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Zuend, A.0000-0003-3101-8521
Additional Information:© 2013 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: 30 November 2012 – Published in Atmos. Chem. Phys. Discuss.: 10 January 2013 Revised: 4 June 2013 – Accepted: 7 June 2013 – Published: 12 July 2013. This material is based upon work supported by the United States National Science Foundation under award no. IRFP 1006117, by ETH Zürich, and by the Competence Center Environment and Sustainability of the ETH Domain (CCES) project IMBALANCE and OPTIWARES. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the US National Science Foundation. Figure 2 was produced using the bar2.m code written by Mike Sheppard of the MIT Lincoln Laboratory. The authors thank Daniel Lienhard of ETH Zürich for performing measurements of the density of 2-methylglutaric acid. Edited by: M. Petters
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Issue or Number:13
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Official Citation:Huisman, A. J., Krieger, U. K., Zuend, A., Marcolli, C., and Peter, T.: Vapor pressures of substituted polycarboxylic acids are much lower than previously reported, Atmos. Chem. Phys., 13, 6647-6662, doi:10.5194/acp-13-6647-2013, 2013
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39953
Deposited By: Tony Diaz
Deposited On:16 Aug 2013 19:52
Last Modified:03 Oct 2019 05:12

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