higher performance characteristics at reasonable prices. Not only for unknown products but also for the quality control of plastic products it is important to characterize the base polymers in the product and their amount I. Suitable for the characterization of synthetic is the technique of analytical pyrolysis hyphenated to gas chromatography with a detection system e.g. mass spectrometry Py-GC/MS) or flame ionization detection (Py-GC/FID). The advantage of Py-GC technique in comparison to other ana- lytical methods for the analysis of polymers like Fourier-transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA) electron microscopy, size-exclusion chromatography (SEC)/gel permeation chromatography (GPC), nuclear magnetic resonance (NMR) and high performance liquid chromatography (HPLC) is the usage of small sample amounts (50-200 jug). Sample pre-