Pyrolysis analysis by Py-GC/MS: an advanced technique for the characterization of organic materials
Pyrolysis 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 useful for studying polymers, microplastics, resins, and other non-volatile or insoluble organic substances .
Thanks to its high sensitivity and 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 pyrolysis analysis (Py-GC/MS) work?
Principle of the technique
Pyrolysis GC/MS analysis relies on the thermal decomposition of a sample in the absence of oxygen, followed by the identification of the generated fragments. This approach allows for obtaining a detailed chemical profile of the analyzed material, even when it is insoluble or non-volatile.
Analysis Process
- Thermal pyrolysis : The sample is heated to high temperatures (500 to 1000°C) in the absence of oxygen . This causes the macromolecules to break down 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.
- Identification by mass spectrometry (MS) : The separated compounds are detected and analyzed to determine their molecular structure, thus providing an accurate chemical fingerprint of the sample.
Technical characteristics of Py-GC/MS pyrolysis analysis
- Qualitative and semi-quantitative analysis : Allows for the characterization of the chemical nature of materials and the identification of the main components.
- High sensitivity : Detection of trace amounts 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 : Enables rapid identification of components, with usable results in a few hours.
What types of samples are suitable for analysis by Py-GC/MS pyrolysis?
analysis by Py-GC/MS is particularly effective for complex organic materials , whether natural or synthetic.
Commonly analyzed materials:
Main industrial applications of Py-GC/MS pyrolysis
Cryogenic electron microscopy is an essential technology for many industrial sectors:
Léa Géréec
Technical and scientific advisor
