Phenolic and volatile compounds are important for the health and sensory characteristics of virgin olive oils (VOO). Qualitative and quantitative presence in the oil is closely related to the olive variety. VOO samples from 3 Sicilian olive cultivars in consecutive years and at 3 different harvest periods were analysed. PCA analysis of data for phenolic and volatile compounds of VOO showed that they were principally discriminated into varieties. The most important compounds for this discrimination (P < 0.05) were the aldheydes (Z)-3-hexenal and (E)-2-hexenal and the corresponding esters, and secoiridoid derivatives. Sample differentiation according to the year of production was possible; oils from the 2nd year were characterized by a greater phenolic compounds concn., whereas (Z)-3-hexenyl-acetate and hexyl acetate characterizated the samples produced during the 1st year.
Characterisation of Sicilian virgin olive oils: phenolic and volatile compounds as markers
ESPOSTO, Sonia;SELVAGGINI, Roberto;TATICCHI, AGNESE;URBANI, Stefania;DI MAIO, ILONA;VENEZIANI, GIANLUCA;SORDINI, BEATRICE;SERVILI, Maurizio
2013
Abstract
Phenolic and volatile compounds are important for the health and sensory characteristics of virgin olive oils (VOO). Qualitative and quantitative presence in the oil is closely related to the olive variety. VOO samples from 3 Sicilian olive cultivars in consecutive years and at 3 different harvest periods were analysed. PCA analysis of data for phenolic and volatile compounds of VOO showed that they were principally discriminated into varieties. The most important compounds for this discrimination (P < 0.05) were the aldheydes (Z)-3-hexenal and (E)-2-hexenal and the corresponding esters, and secoiridoid derivatives. Sample differentiation according to the year of production was possible; oils from the 2nd year were characterized by a greater phenolic compounds concn., whereas (Z)-3-hexenyl-acetate and hexyl acetate characterizated the samples produced during the 1st year.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
