Learn how to get more out of your measurements on organics when combining DSC and TGA

Differential scanning calorimetry (DSC) is the most widely used thermal analysis technique in the field of pharmaceuticals, cosmetics and food. Its strength lies in its capability to detect and monitor phase transitions of such materials. In order to find a suitable temperature program for an unknown material or to be able to heat the same substance several times, it is advantageous to have an idea about the thermal stability range of the particular sample. This can be realized using thermogravimetric analysis. TGA measures mass losses of materials during heating.   
However, TGA can do even more. TGA can also be of great help in the interpretation of DSC curves. Applying both methods in combination, it is possible to distinguish whether an effect is related to structural changes or mass losses (due to evaporation, decomposition, etc.). And if, in addition, an evolved gas analyzer, for example an FT-IR spectrometer, is coupled to the thermobalance, you will also get information about the processes behind the mass losses.

October 8, 2019

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