Static Headspace Sampling and Solid-Phase Microextraction for Assessment of Edible Oils Stability

Static headspace sampling and headspace solid-phase microextraction have been applied for the determination of the low molecular mass aldehydes-markers of edible oil oxidation. Preconcentration and determination conditions for the two procedures were optimized. LODs LOQs and repeatability of a standard mixture were established for all investigated compounds. Both methods of sampling were applied to the analysis of samples of rapeseed and sunflower oils. It appears that solid-phase microextraction is better than headspace sampling for the analysis of volatile oxidation products. Solid-phase microextraction can be conducted at a much lower temperature and has lower LOD values and better repeatability than headspace sampling.