title: Qualitative and semiquantitative analysis of phenolic compounds in extra virgin olive oils as a function of the ripening degree of olive fruits by different analytical techniques.
abstract: Capillary electrophoresis (CE) can be effectively used as a fast screening tool to obtain qualitative and semiquantitative information about simple and complex phenolic compounds of extra virgin olive oil. Three simple phenols (tyrosol, hydroxytyrosol, and vanillic acid), a secoiridoid derivative (deacetoxy oleuropein aglycon), and two lignans (pinoresinol and acetoxypinoresinol) were detected as the main compounds in extra virgin olive oils by high-performance liquid chromatography (HPLC) and capillary zone electrophoresis (CZE). Spectrophotometric indices, radical scavenging activity, and oxidative stability of extra virgin olive oil samples obtained from olives hand-picked at different ripening degrees were statistically correlated with the CZE and HPLC quantification. The concentration of phenols in extra virgin olive oil decreased with ripeness of olive fruits. The high correlations found between CZE and the other analytical results indicate that CE can be applied as a rapid and reliable tool to routinely determine phenolic compounds in extra virgin olive oils.
authors.affiliation: Dipartimento di Scienze degli Alimenti, Università di Bologna, Piazza Goidanich 60, 47023 Cesena (FC), Italy.
authors.forename: Matteo
authors.initials: M
authors.lastname: Bonoli
authors.forename: Alessandra
authors.initials: A
authors.lastname: Bendini
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Cerretani
authors.forename: Giovanni
authors.initials: G
authors.lastname: Lercker
authors.forename: Tullia Gallina
authors.initials: TG
authors.lastname: Toschi
mesh_terms: D002851:Chromatography, High Pressure Liquid; D019075:Electrophoresis, Capillary; D005638:Fruit / Q000737:chemistry / Q000254:growth & development*; D031658:Olea / Q000254:growth & development*; D000069463:Olive Oil; D010636:Phenols / Q000032:analysis*; D010938:Plant Oils / Q000737:chemistry*
chemical_list: D000069463:Olive Oil; D010636:Phenols; D010938:Plant Oils