Pyrolysis analysis Py-GC/MS: an advanced technique for the characterization of organic materials
analysis Py-GC/MS (Pyrolysis coupled with gas chromatography and mass spectrometry) is a powerful method for identifying the chemical composition of complex organic materials. It is particularly used for the study of polymers, microplastics, resins and other non-volatile or insoluble organic substances .
Thanks to its high sensitivity and its ability to analyze samples in their raw form, this technique is a key tool for various industrial sectors such as food, cosmetics, animal health, packaging and polymer materials .
How does Py-GC/MS pyrolysis analysis work?
Principle of the technique
Pyrolysis analysis (Py-GC/MS) is based on the thermal decomposition of a sample in the absence of oxygen, followed by the identification of the generated fragments. This approach allows for a detailed chemical profile of the analyzed material, even when it is insoluble or non-volatile.
Progress of the analysis
- Thermal pyrolysis : The sample is heated to high temperatures (500 to 1000°C) in the absence of oxygen . This results in the fragmentation of macromolecules into smaller compounds, called pyrolysates.
- Separation by gas chromatography (GC) : The fragments are transported into a chromatographic column where they are separated according to their volatility and their interactions with the stationary phase.
- Mass spectrometry (MS) identification : Separated compounds are detected and analyzed to determine their molecular structure, providing an accurate chemical fingerprint of the sample.
Technical characteristics of Py-GC/MS pyrolysis analysis
- Qualitative and semi-quantitative analysis : Allows the chemical nature of materials to be characterized and the main components to be identified.
- High sensitivity : Detection of traces of compounds even in very low concentrations.
- Versatility : Suitable for polymers, resins, paints, microplastics and other complex matrices .
- Analysis without prior chemical preparation : Ideal for samples that are difficult to dissolve or extract.
- Speed : Allows rapid identification of components, with usable results within hours.
What types of samples are suitable for Py-GC/MS pyrolysis analysis?
Py-GC/MS pyrolysis analysis is particularly effective for complex organic materials , whether natural or synthetic.
Materials commonly analyzed:
Main industrial applications of Py-GC/MS pyrolysis
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Léa Géréec
Technical and scientific advisor
