Ther­mo­gra­vi­met­rische Ana­lyse

Thermogravimetric analysis (TGA) is used to investigate temperature-dependent events, such as decomposition or oxidation reactions. For this purpose, the mass of the sample is recorded as a function of temperature and time. The so-called thermogram allows for the detection of temperature-dependent changes in the sample’s mass.

Thermogravimetric measurements are carried out using the TGA PT 1000 thermobalance from Linseis. Measurements can be performed under synthetic air or argon atmosphere. Analyses are possible from room temperature up to 1100°C. The heating rate can range from 0.001 to 250 °C/min. The thermobalance allows for sample masses up to 5 g. The resolution of the thermogram is 1 µg.

For the analysis of gaseous decomposition or by-products, the thermobalance is coupled with the Vaccuum Omnistar mass spectrometer from Pfeiffer. This setup enables reliable detection of molecules with mass-to-charge ratios (m/z) of up to 100.