Abstract
The qualitative changes in pyrolysis mass spectra obtained under various experimental conditions were studied by factor analysis. The parameters involved are the pyrolysis method (oven vs. filament), the method of cleaning the pyrolysis wire, the choice of the suspending liquid, the sample size, the filament position, the temperature-time profile and the temperature of the expansion chamber.For a number of these parameters, factor analysis of the data enabled a physico-chemical interpretation of the variations in the pyrolysis mass spectra to be made.An increased formation of dehydrogenated fragments was observed at higher equilibrium temperatures and for oven pyrolysis. Condensation of less volatile pyrolysis products at relatively cold parts of the inlet system (reaction tube and expansion chamber) was clearly observed.
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