EGA – FTIR (EGA Gas Analysis / Couplings)


On point

Fourier Transform Infrared Spectroscopy (FTIR) is a powerful analytical technique employed to obtain an infrared spectrum of absorption, emission, photoconductivity, or Raman scattering from a wide range of substances, including solids, liquids, and gases. An FTIR spectrometer offers the distinct advantage of simultaneously collecting spectral data across a broad spectral range. This capability sets it apart from dispersive spectrometers, which measure intensity within a narrow wavelength range at a time. FTIR has largely replaced dispersive infrared spectrometers, expanding the horizons of infrared spectroscopy.


The coupling of a Linseis Thermal Analyzer with an FTIR system is particularly intriguing in fields such as polymers, the chemical industry, and the pharmaceutical sector. This integration offers synergistic benefits that exceed the individual capabilities of each system. The Linseis coupling leverages extensive knowledge and an integrated hardware and software concept. It provides various libraries for interpretation, making it a valuable tool for research and analysis in these industries.

You are interested in a coupling?

You need more information?

Contact our application experts!


Thermobalance + FTIR Spectrometer in the temperature range from –170°C up to 1750°C

  • L81/I-FTIR Thermo balance + FTIR Spectrometer
  • L81/II-FTIR Thermo balance + FTIR Spectrometer
  • STA PT 1600-FTIR Thermo balance + FTIR Spectrometer
  • STA PT 1000-FTIR Thermo balance + FTIR Spectrometer

The Pulse-Analysis injects a exactly predetermined amount of liquid or gas into the Thermobalance (TGA) or Simultaneous Thermal Analyzer (STA). This enhances the measurement possibilities significantly: the MS or FTIR can now be calibrated. Out gassings can be quantified precisely with this method.

Modell FTIR – Gas analysi (EGA coupling)
Wave number range: 7500 cm-1 … 370 cm-1
Resolution: 1 cm-1
Heating: Transfer line and adapter
Transfer line material: PTFE (exchangeable)
Couplings: DIL, TMA, STA, TGA, DTA, DSC

Possible Couplings

Thermo balance with coupling to Nicolet FTIR spectrometer. The coupling is made with a heated capillary.


  • Research balance (different models) with TG or simultaneous TG/DSC or TG/DTA measurement.
  • High precision ThermoFisher Nicolet FTIR spectrometer (different model available).
  • Temperature range -170°C up to + 1750°C Three separate heating zones, at capillary, at TG protection tube and at FTIR measuring cell.
  • Carrier gas with wide range of flow rates. Especially developed JLF-detector with long optical pass length.

Both manufacturers Linseis and ThermoFisher Nicolet are some of the leading companies in their specialized fields. This cooperation guarantees outstanding performance for the combined system.

  • Transfer line is temperature controlled up to a maximum of 250°C.
  • Fast response time through short transfer line.
  • FTIR detector with very high sensitivity and with different wave numbers available.

The following applications can be measured: Outgasing components of burned material (paints etc.) Determination of blenders and additives. Absorption and Desorption processes. Analysis of rubbers and plastics.


Application Example: Cement

Cement is an inorganic, non-metallic material that, when mixed with water, hardens and retains its hardness even when submerged in water. Portland cement, the most common type, is made from limestone, clay, and/or sand, with additives like gypsum and anhydrite influencing its setting time. Impurities in the raw cement can negatively impact its quality.

Analysis using thermogravimetry and FTIR (Fourier Transform Infrared Spectroscopy):

Thermal analysis is a valuable tool for identifying and quantifying additives in cement. The analysis involves several steps, such as the release of water from CaSO4 di-hydrate to CaSO4 half-hydrate and the subsequent conversion of CaSO4 half-hydrate to CaSO4 anhydrite. The evolved water can also be confirmed using FTIR analysis. At temperatures between 600°C and 750°C, carbonates in the cement decompose, releasing CO2. The FTIR signal shows a shoulder in the CO2 trace, indicating the decomposition of MgCO3. These techniques help in characterizing the composition and behavior of cement materials, ensuring quality control and performance optimization in construction and related industries.


Couplings / Gas analysis Product Brochure (PDF)

Product brochure (245Kb)

Product brochure (47Kb)

Product brochure (113Kb)

Product brochure (47Kb)

Chip-DSC Product Brochure (PDF)

Chip-DSC Product Brochure (PDF)

Chip-DSC Product Brochure (PDF)

Scroll to Top