Evolved Gas Analysis EGA
Many samples, on heating, release gases or vapour through desorption or decomposition. This release is accompanied by thermal effects and, obviously, mass-losses, which, themselves, can be detected by the appropriate thermal analysis technique, e.g. DTA or DSC and TG, respectively.
Evolved Gas Analysis (EGA) is the analysis of the effluent of analytical equipment and chemical processes. Usually, a Mass Spectrometer, or FTIR, or both, are used together with Thermogravimetric Analyzer (TGA).