Evolved Gas Analysis (EGA) – Identification of gases emitted by materials
Characterize thermal degradation and volatile emissions using EGA analysis
Evolved Gas Analysis (EGA) is an essential analytical technique for detecting, identifying, and quantifying the gases released or emitted by a substance when subjected to controlled heating. It allows for the evaluation of the thermal stability of materials, the analysis of their behavior under degradation conditions, and the identification of released volatile compounds.
Used in many industrial sectors, this technique is a key tool for quality control, regulatory compliance and formulation optimization.
How does the EGA Analysis work?
EGA analysis relies on a coupling between a heating technique and a method for detecting emitted gases. Its operation is broken down into several steps:
- Sample heating – A controlled temperature increase is applied, under an inert or oxidizing atmosphere, to cause the release of gases.
- Collection and transfer of emitted gases – Volatile compounds are captured and directed to an analysis system.
- Gas identification and quantification – Several analytical techniques can be used:
- Mass spectrometry (MS) : detection of the molecular masses of emitted gases.
- Infrared spectroscopy (FTIR) : identification of functional groups of molecules.
- Gas chromatography (GC) : separation and characterization of compounds.
- Interpretation of results – Data analysis helps to understand the thermal transformations and chemical reactions affecting the sample.
This process makes it possible to obtain detailed information on the nature of gaseous emissions and their correlation with the composition of materials.
Technical characteristics of the EGA analysis
EGA Analysis stands out for its flexibility and compatibility with different analytical equipment:
Temperature range : up to several hundred degrees Celsius, depending on analytical needs.
Detection methods : mass spectrometry (MS), FTIR spectroscopy, gas chromatography (GC).
Analysis atmospheres : inert (nitrogen, argon) or oxidizing (air, oxygen) depending on the type of reaction being studied.
Types of analyzable samples : solids, powders, films, viscous liquids.
Possible coupling with other techniques : thermogravimetry (TGA), differential scanning calorimetry (DSC) for in-depth thermal analysis.
Which matrices can be analyzed with EGA Analysis?
EGA analysis is suitable for a wide range of samples requiring thermal and chemical characterization:
Thanks to its precision and versatility, EGA Analysis is an essential tool for understanding the thermal behavior of materials and optimizing their industrial use.
Industrial Applications of EGA Analysis
EGA Analysis is used in various industrial sectors to address issues related to safety, regulation, and innovation:
EGA Analysis is used in various industrial sectors to address issues related to safety, regulation, and innovation:
Léa Géréec
Technical and scientific expert
