Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. analysis and testing techniques
6. chromatography
7. gas chromatography
8. gas chromatography-mass spectrometry

Anotations

Scope note:

A method of chemical analysis in which a small sample of material is inserted into a pyrolysis unit before subsequently analyzed using the techniques of gas- chromatography and mass spectrometry in tandem. This method enables a reproducible characterisation of the macromolecular complexes found in virtually all materials in the natural environment.