Abstract

In this work, measurements of free acidity, peroxide content, spectrophotometric parameters, chlorophyll content, phenols, sterols, fatty acids and triacylglycerol composition, were carried out on samples of virgin olive oils (VOOs) coming from four different Greek Ionian islands, i.e. Zakynthos, Kefalonia, Lefkada and Kerkyra. An analysis of variance (ANOVA) highlighted statistically significant differences (p<0.01) in the values of 26 analytical parameters among the VOOs produced in the four different geographical regions but a Post-Hoc test showed that no variable was able to distinguish all four origins. Analogously, a Principal Component Analysis (PCA) showed a modest grouping of VOOs according to geographical origin except for Kerkyra samples which were more distinct from others. Applying discriminant function analysis (DFA) a good separation of the four geographical groups was achieved with classification and prediction abilities equal to 97.7% and 95.3%, respectively. Moreover, the analysis of the standardized coefficients showed that the fatty acids and triacylglycerols were the most discriminant variables. This last outcome was confirmed by comparison of the prediction performances obtained applying DFA on four subdatasets containing fatty acids (69.8%), triacylglycerols (76.7%), sterols (62.8%), and remaining parameters (65.1%) together, respectively. As the results showed, the multidisciplinary approach that combines different types of analytical determinations improved the discrimination of geographical origin for Greek virgin olive oils.

Autore Pugliese

• Longobardi Francesco

Tutti gli autori

• LONGOBARDI F.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2012

ISSN

0308-8146

ISBN

Non Disponibile

Numero di citazioni Wos

36

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

38

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile