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Deliquescence of malonic, succinic, glutaric, and adipic acid particles.

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Title: Deliquescence of malonic, succinic, glutaric, and adipic acid particles.
Author: Lipetz, Sarah R.; Mak, Jackson; Parsons, Matthew T.; Bertram, Allan K.
Issue Date: 2004-03
Publicly Available in cIRcle 2011-04-15
Publisher American Geophysical Union
Citation: Parsons, Matthew T., Mak, Jackson, Lipetz, Sarah R., Bertram, Allan K. 2004. Deliquescence of malonic, succinic, glutaric, and adipic acid particles. Journal of Geophysical Research Atmospheres 109(6) D06212 dx.doi.org/10.1029/2003JD004075
Abstract: In order to understand and predict the role of organic particles in the atmosphere their deliquescence behavior must be understood. Using an optical microscope coupled to a flow cell, we investigated the deliquescence of malonic, succinic, glutaric, and adipic acid particles with sizes ranging from 2 to 40 mm. Deliquescence relative humidities were determined for temperatures ranging from 293 to 243 K. Over this temperature range both succinic acid and adipic acid deliquesced at approximately 100% relative humidity, whereas malonic acid and glutaric acid deliquesced at significantly lower relative humidities. These results are generally in good agreement with previous studies and are within 3% of calculations based on the UNIQUAC (universal quasi-chemical) Functional Group Activity Coefficients (UNIFAC) model and recently published interaction parameters. Our studies also include measurements at temperatures below the eutectic temperatures. At these temperatures, ice did not nucleate; rather the particles underwent deliquescence to form metastable solution droplets. This indicates that solid dicarboxylic acids are not good ice nuclei above 243 K and hence will probably not play a role in ice cloud formation at these temperatures. An edited version of this paper was published by AGU. Copyright 2004 American Geophysical Union.
Affiliation: Science, Faculty ofChemistry, Department of
URI: http://hdl.handle.net/2429/33689
Peer Review Status: Reviewed
Scholarly Level: Faculty

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