Phase Diagrams and Water Activities of Aqueous Dicarboxylic Acid Systems of Atmospheric Importance

被引：17

作者：

Beyer, Keith D. ^{[1
]}

Friesen, Katherine ^{[1
]}

Bothe, Jameson R. ^{[1
]}

Palet, Benjamin ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Chem, La Crosse, WI 54601 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2008年 / 112卷 / 46期

关键词：

D O I：

10.1021/jp805985t

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have studied liquid/solid phase diagrams and water activities of the dicarboxylic acid/water binary systems for maleic, dl-malic, glutaric, and succinc acids using differential scanning calorimetry, infrared (IR) spectroscopy of thin films, and conductivity analysis of saturated solutions. For each binary system we report the measurements of the ice melting envelope, the acid dissolution envelope, and the ice/acid eutectic temperature and composition. Water activities have been determined by using the freezing point depression of ice. Additionally, an irreversible solid/solid phase transition for maleic acid was observed in both DSC and IR studies likely due to the conversion of a meta-stable crystal form of maleic acid to its most stable crystal form. In general we find good agreement with literature values for temperature-dependent acid solubilities.

引用

页码：11704 / 11713

页数：10

共 36 条

[1]

[Anonymous], 2012, Microphysics of Clouds and Precipitation: Reprinted 1980

[2] SOLUBILITY OF OXALIC, MALONIC, SUCCINIC, ADIPIC, MALEIC, MALIC, CITRIC, AND TARTARIC-ACIDS IN WATER FROM 278.15-K TO 338.15-K [J].