Characterization and quantification of phenolic compounds in olive oils by solid-phase extraction, HPLC-DAD, and HPLC-MS/MS - De La Torre-Carbot, K; Jauregui, O; Gimeno, E; Castellote, A I; Lamuela-Raventós, R M; López-Sabater, M C (J Agric Food Chem, 2005)