Solid/Liquid Phase Diagram of the Ammonium Sulfate/Malic Acid/Water System

被引：4

作者：

Schroeder, Jason R. ^{[1
]}

Pearson, Christian S. ^{[1
]}

Beyer, Keith D. ^{[1
]}

机构：

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

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2012年 / 116卷 / 01期

基金：

美国国家科学基金会;

关键词：

DICARBOXYLIC-ACIDS; INORGANIC ELECTROLYTES; THERMODYNAMIC MODELS; AQUEOUS-SOLUTIONS; WATER ACTIVITIES; 298.15; K; AEROSOLS; BEHAVIOR; ORGANICS;

D O I：

10.1021/jp206101v

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 the low temperature phase diagram and Water activities of the ammonium sulfate/malic acid/water system using differential scanning calorimetry (DSC) And infrared spectroscopy (IR) of thin films. Using the results from our experiments we have mapped the ice primary phase region of the solid/liquid ternary phase diagram. In our DSC and IR experiments We observe ice nucleation in all samples and ammonium sulfate in some samples, which Were cooled to 183 K. However, we only observed malic acid nucleation in IR experiments, where the sample was in contact with ZnSe windows. We also compare our results to the predictions of the Extended AIM Aerosol Thermodynamics Model (E-AIM) and find good agreement for the ice melting points in the ice primary phase field of this system; however, the E-AIM has difficulty predicting,malic acid crystallization.

引用

页码：415 / 422

页数：8

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