NMR-Metabolomic Study on Monocultivar and Blend Salento EVOOs including Some from Secular Olive TreesReport as inadecuate




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The aim of the present work has been to characterize, byNMR-based metabolic profiling, extravirgin olive oils EVOOs from asubarea Salento of Apulia, leader EVOO producer among the Italian regions.According to the European Union EU definition, Protected Designation ofOrigin PDO products are mostly closelylinked to the concept of terroir due to the placeof origin, climate and local know-how. Moreover, the authenticity and traceability of several productssuch as olive oils with specific geographical origin require to be preserved byanalytical methods. In this regard, about a hundred EVOO samples monovarietaland blend samples, cultivars Ogliarola Salentina and Cellina di Nardò, basis of-Terra d’Otranto- PDO, campaign 2012-2013 were therefore analyzed by 1HNMR spectroscopy and multivariate statistical analysis. Both unsupervised PCAand supervised OPLS-DA statistical analyses allowed differentiation of monocultivar oils and blends characterization. Other features suchas the age of the trees young, 100years could also be investigated. Cellina samples showed a higher content ofaldehydic and phenolic compounds, while Ogliarola samples were characterized byNMR signals in the range of δH 6.5 - 5.6, which could be ascribed to higher carotenoidscontent. Higher polyphenols and polyunsaturated fatty acid content were alsofound in young over secular tree EVOOs.

KEYWORDS

Cellina Di Nardò; Ogliarola Salentina; EVOOs; 1H NMR Spectroscopy; Multivariate Statistical Analysis, MVA; Principal Component Analysis, PCA; Orthogonal Partial Least Squares Discriminant Analysis OPLS-DA

Cite this paper

Coco, L. , Pascali, S. and Fanizzi, F. 2014 NMR-Metabolomic Study on Monocultivar and Blend Salento EVOOs including Some from Secular Olive Trees. Food and Nutrition Sciences, 5, 89-95. doi: 10.4236-fns.2014.51012.





Author: Laura Del Coco, Sandra A. De Pascali, Francesco P. Fanizzi

Source: http://www.scirp.org/



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