Practical applications: These results may be useful at an industrial level as well as from a scientific viewpoint to assess the factors influencing volatiles headspace concentration after filtration. 6-Methyl-5-hepten-2-one and heptanol also increased after filtration, while t, t-2,4-hexadienal, t-2-hexen-1-ol, and c-2-penten-1-ol significantly decreased.

The majority of 38 volatile compounds analyzed by the SPME-GC/MS technique did not change significantly ( p ≤ 0.05) after industrial filtration, while some of them increased their initial concentration up to twofold, i.e., 2-methylbutanal. Little but significant changes were also observed for some fatty acids. The content of total phenolic compounds did not change dramatically, but hydroxytyrosol and 3,4-DHPEA-EA were significantly lower in filtered oil, arising from complex biophenols hydrolysis. Peroxide value was significantly higher after the filtration process, probably due to further exposure to oxygen. Filtration did not cause significant changes in some quality indices, i.e., acidity and spectrophotometric indices, with the exception of K 232 value. Ravece (Campania region, Italy) was studied to investigate the effects of the industrial filtration process on the legal quality parameters, fatty acids, phenolics, and volatile compounds.

Alfa laval cas software ag