Cultivar discrimination, fatty acid profile and carotenoid characterization of monovarietal olive oils by Raman spectroscopy at a single glance

Author(s)
Portarena, Silvia
Anselmi, Chiara
Zadra, Claudia
Farinelli, Daniela
Famiani, Franco
Date Issued
2019
Type
article
Volume
96
Start Page
137
End Page
145
DOI
ISSN
0956-7135
Journal
Abstract
Monovarietal extra virgin olive oils (EVOOs) from Olea europea trees grown in the same experimental orchard have been characterized by Raman spectroscopy combined with chemometrics. Linear discriminant analysis of the EVOO Raman spectra correctly classified up to 94.4% of samples, as a function of the cultivar, at four different maturation stages. The sensitivity of Raman spectroscopy to the oil cultivar is due to the genotypic dependence of the olive oil composition in terms of both carotenoid and fatty acids. Thus, using gas chromatography as the reference technique, models for predicting the oleic, palmitic and linoleic acid content are obtained combining Raman spectra and partial least squares regression analysis. Evidences that a similar approach could be implemented also for carotenoid characterization are provided.
Subjects

Carotenoids

Chemometrics

Cultivar

Fatty acids

Olive oil

Raman spectroscopy

Ripening

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