Fourier transform infrared spectrometer (FT-IR) spectroscopy is a well-established analytical method. FT-IR spectrometers are used in numerous laboratories. In many cases, these are coupled to thermal analysis systems to obtain a better understanding of the decomposition or evaporation methods under examination.

The FT-IR series from NETZSCH can be easily coupled with vacuum-tight thermal balances and simultaneous thermal analysis instruments TG/STA 449 F3 Jupiter®, TG 209 F1 Libra®, and TG/STA 449 F1 Jupiter® as well as dynamic differential calorimeters DSC 404 F1 Pegasus® and DSC 204 F1 Phoenix®.

In the polymer, chemical, and pharmaceutical sectors, there is a great deal of interest to understand the evolving gases during a process, a decomposition, a curing/cross-linking, or any other reaction.

The transfer line and the connection adaptors to the furnaces are heatable up to 230°C to prevent a condensation of the decomposition products as far as possible. Gas phases libraries are provided for spectra interpretation.

There are three modes of connecting FT-IR to a thermal analyzer:

  • Direct PERSEUS® coupling without the use of a transfer line
  • Coupling to an internal gas cell through a transfer line using the FT-IR sample chamber
  • Coupling to an external gas cell through a transfer line for highest FT-IR system flexibility.


  • Solid-gas reactions – corrosion; combustion; catalysis; oxidation
  • Decomposition – dehydration; residual solvent content; pyrolysis
  • Evaporation, outgassing
  • Compositional analysis - binder burn-out, polymer content; coal analysis; ash content

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