Ice Melting in the Ammonium Sulfate/Malonic Acid/Water Ternary System
Abstract
The low temperature phase diagram of ammonium sulfate/malonic acid/water has been investigated using differential scanning calorimetry (DSC) and FTIR of thin films. It is seen that the minimum ice melting point lowers from approximately 254 K in the individual binary systems (malonic acid/water, ammonium sulfate/water) to 242 K in the ternary system. In addition, we have utilized a new technique to measure deliquescence relative humidities at low temperatures for this and other atmospherically relevant aqueous systems. The Humidity-controlled Thermogravimetric Analyser (HTGA) will be described and sample results discussed.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2008
- Bibcode:
- 2008AGUFM.A41J0251B
- Keywords:
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- 0305 Aerosols and particles (0345;
- 4801;
- 4906);
- 0320 Cloud physics and chemistry;
- 0365 Troposphere: composition and chemistry;
- 0394 Instruments and techniques