Technical Reference
TA I
NSTRUMENTS
TGA 20504–14
Theory of
Operation
Thermogravimetric analysis (TGA) is a thermal
analysis technique for measuring the amount and
rate of change in sample mass as a function of
temperature and time. It is used to characterize
any material that exhibits weight loss or phase
changes as a result of decomposition, dehydra-
tion, and oxidation. Two modes are commonly
used for investigating thermal stability behavior
in controlled atmospheres: (1) dynamic, in
which the temperature is increased at a linear
rate, and (2) isothermal, in which the tempera-
ture is kept constant.
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