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Differential Thermal Analysis (DTA)
Differential thermal analysis has long been applied in the study
of minerals such as clay minerals, carbonates, sulphates and
zeolites, sulfides and arsenides, graphite. Thermal analysis
instruments predominantly use thermocouples, platinum resistance
thermometers, and thermistors. When the sample undergoes a transformation,
it will either absorb (endothermic) or release (exothermic)
heat.
In differential thermal analysis, the ToC difference between
a reactive sample and a non-reactive reference is determined
as a function of time, providing useful information about the
temperatures, thermodynamics and kinetics of reactions.
Thermogravimetric analysis determines the weight gain or loss
of a condensed phase due to gas release or absorption as a function
of temperature. |
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