The two techniques of TGA and IR spectroscopy can be combined to obtain additional information on a material.
Measurements are carried out with a PerkinElmer TGA 4000 coupled to a gas cell in a PerkinElmer Frontier FT-IR spectrometer. Samples can be measured over a temperature range of 35 to 1,000 °C in nitrogen or air, with the gases released being measured online in the IR spectrometer.
The method can be used to determine whether mass loss in a sample has to do with evaporation of specific components or is the result of degradation. In the case of multi-component systems, the order of evaporation can also be established.