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Thermal analysis of water-containing systems
T W Schenz1, B Israel, M A Rosolen
1Abbott Laboratories, Ross Division, Columbus OH 43216.
Advances in Experimental Medicine and Biology
|January 1, 1991
Summary
This study reviews thermal analysis methods for food systems. Techniques like DSC, TMA, TGA, and DMA help analyze water content, transitions, and physical properties.
Area of Science:
- Food Science
- Analytical Chemistry
- Materials Science
Background:
- Water content significantly impacts food properties.
- Understanding water's role is crucial for food processing and stability.
- Traditional methods for water analysis have limitations.
Purpose of the Study:
- To review thermal analytical techniques for studying water in food systems.
- To highlight the application of DSC, TMA, TGA, and DMA in food analysis.
- To demonstrate the utility of these methods for characterizing water-related properties.
Main Methods:
- Differential Scanning Calorimetry (DSC) for freezable water and melting points.
- ThermoMechanical Analysis (TMA) for glass transitions and softening points.
- ThermoGravimetric Analysis (TGA) for water uptake and content.
- Dynamic Mechanical Analysis (DMA) for low-energy transitions.
Main Results:
- DSC quantifies freezable water and thermal transitions.
- TMA provides insights into water-dependent softening and glass transitions.
- TGA effectively determines water content and uptake kinetics.
- DMA identifies subtle, low-energy transitions influenced by water.
Conclusions:
- Thermal analytical techniques are versatile tools for food system analysis.
- These methods offer detailed information on water's physical and chemical states.
- The reviewed techniques enhance understanding of food structure and behavior.