Hyphenated Techniques – Evolved Gas Analysis (EGA)

By coupling a Thermobalance (TG, TGA), Simultaneous Thermal Analyzer (STA, TGA-DSC) or Dilatometer (DIL) with a Quadrupole Mass Spectrometer (QMS), it is possible to detect and identify evolved gases in exact time correlation with TGA or STA signals.

The Combination with an FT-IR (Fourier Transform Infrared Spectrometer) has become an absolute must, especially in the polymer-producing, chemical and pharmaceutical industries.

The GC (gas chromatograph) separates gas mixtures based on the differences in component distribution between a stationary phase (e.g., inner coating of a capillary) and a mobile phase (e.g., He). The purge gas rapidly carries away gas components with a low affinity for the stationary phase. Gases with a high affinity for the stationary phase will follow with a significant time delay (“retention time”).

Our complete EGA Systems include:

  • Our Fourier Transform Infrared (FT-IR) spectrometers coupled to thermal analysis. Especially in the polymer field as well as in the pharmaceutical and chemical industries, it can be very useful to have knowledge about the gases that evolve during a process, curing/cross-linking, decomposition or any other reaction.
  • The PERSEUS® STA 449 F1 /F3 Jupiter® is an unmatched alliance between two successful instruments: the NETZSCH STA 449 Jupiter® and the FT-IR spectrometer by Bruker Optics. Its design is unprecedented and sets a benchmark for state-of-the-art coupling systems.
  • The PERSEUS® TGA 209 F1 Libra® is robust and stands out by virtue of its high performance, compactness and attractive price.
  • The 403 Aëolos® Quadro quadrupole mass spectrometer is a new compact mass spectrometer with a heated capillary inlet system for routine analysis of gases and, in particular, volatile decomposition products of thermal analysis.
  • TGA/STA-GC-MS Coupling, Highly Sensitive Gas Chromatography-Mass Spectrometry (GC-MS) Coupling to Thermal Analysers for Precise Identification of Gas Species. The primary scope of TGA/STA-GC-MS coupling is to detect, separate and analyse organic components.

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