title: Evolution of minor polar compounds and antioxidant capacity during storage of bottled extra virgin olive oil.
abstract: We characterized "Olivastra Seggianese" extra virgin olive oil (EVOO) and evaluated its chemical and sensory characteristics and antioxidant and antiradical activities during storage under novel conditions. Two oils (A and B) were analyzed for the commodity characteristics at blending (t0) and after 9, 12, and 18 months; panel tests were performed and minor polar compounds (MPC) content was assessed at blending (t0) and after 6, 9, 12, and 18 months. Antioxidant and antiradical activities in vitro were evaluated at t0 and after 12 months, by human low density lipoprotein (LDL) and 1,1-diphenyl-2-picrylhydrazil radical (DPPH*) tests. Oil A, which had an initially higher MPC content, possessed "harder" organoleptic characteristics than oil B, which had a lower MPC content and was endowed with a "smoother" taste profile. Statistical analyses showed that secoiridoids, particularly deacetoxy-oleuropein aglycone, should be quantified to evaluate EVOO stability during storage. The antioxidant activity toward human LDL was linked to MPC content and to storage time. The tests on the stable free radical DPPH* confirmed the results on human LDL. We propose this as an additional parameter to evaluate olive oil quality and stability over time.
authors.affiliation: Department of Pharmaceutical Science, University of Florence, Sesto Fiorentino, Florence, Italy.
authors.forename: Annalisa
authors.initials: A
authors.lastname: Romani
authors.forename: Chiara
authors.initials: C
authors.lastname: Lapucci
authors.forename: Claudio
authors.initials: C
authors.lastname: Cantini
authors.forename: Francesca
authors.initials: F
authors.lastname: Ieri
authors.forename: Nadia
authors.initials: N
authors.lastname: Mulinacci
authors.forename: Francesco
authors.initials: F
authors.lastname: Visioli
mesh_terms: D000975:Antioxidants / Q000032:analysis* / Q000494:pharmacology; D005519:Food Preservation; D016166:Free Radical Scavengers / Q000032:analysis / Q000494:pharmacology; D006801:Humans; D015227:Lipid Peroxidation / Q000187:drug effects; D008077:Lipoproteins, LDL / Q000737:chemistry; D000069463:Olive Oil; D010938:Plant Oils / Q000737:chemistry*; D013649:Taste; D013997:Time Factors
chemical_list: D000975:Antioxidants; D016166:Free Radical Scavengers; D008077:Lipoproteins, LDL; D000069463:Olive Oil; D010938:Plant Oils