Thermal gravimetric analysis (TGA) is a type of testing performed on samples that determines changes in
weight in relation to change in temperature. Such analysis relies on a high degree of precision in three
measurements: weight, temperature, and temperature change.
When TGA is combined with specific heat measurements, it is referred to as simultaneous thermal analysis (STA).
The results of both techniques can be directly compared, as reaction equilibria are not affected by differing sample
atmospheres which can occur with single measurements. In addition, the thermal effects measured in this way are easier
to interpret and enthalpy changes can be corrected for weight changes. Moreover, Simultaneous Thermal Analysis is
able to eliminate the uncertainties arising with separate TG and DSC measurements, caused by the inhomogeneity
and geometry of samples and inaccuracy in the temperature.
At TPRL, Inc., we use the Netzsch STA
to perform thermal gravimetric analyses over a temperature range of room temperature to 1300°C and simultaneous
thermal analyses over a temperature range of room temperature to 400°C.
We use the Instrument Specialists STA to perform thermal gravimetric analyses
and simultaneous thermal analyses over a temperature range of room temperature to 1500°C