The characteristics of percolation olive oils produced with a new processing enzyme aid

Theee olive Varieties (Leccino, Coratina and Dritta) were processed using the percolation-centrifugation system with a new olive enzyme processing aid, 'Cytolase 0'. The enzyme adjuvant led to oils characterized (with respect to reference oils) mostly by: (i) higher contents of total phenols, o-diphenols, tyrosol- and hydroxytyrosol-aglycones, tocopherols, trans-2-hexenal and other pleasant aromatic volatile compounds, and triterpene alcohols. (ii) higher values of oxidative stability and carotenoid colour index; (iii) higher ratios of 1,2-diglycerides/1,3-diglycerides, campesterol/stigmasterol, trans-2-hexenal/hexanal, and trans-2-hexenal/total aroma (iv) lower values of turbidity; (v) similar values of acidity, peroxide index, carbonyl index, UV (ultraviolet) spectrophotometric indices and alcoholic index; (vi) similar contents of saturated fatty acids, unsaturated fatty acids, triglycerides, diglycerides, sterols, and green lipochromes; and (vii) similar sensory score. Stigmastadienes, trans-oleic, trans-linoleic, and trans-linolenic acid isomers were not detected. Hence, the enzyme adjuvant produced better qualitative characteristics and higher extraction outputs.