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Open AccessArticle

Varietal Authentication of Extra Virgin Olive Oils by Triacylglycerols and Volatiles Analysis

University of Perugia, Department of Pharmaceutical Sciences, Section of Food Science and Nutrition, Via San Costanzo, 06126 Perugia, Italy
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Foods 2019, 8(2), 58; https://doi.org/10.3390/foods8020058
Received: 31 December 2018 / Revised: 28 January 2019 / Accepted: 1 February 2019 / Published: 5 February 2019
(This article belongs to the Special Issue Olive Oil: Processing, Characterization, and Health Benefits)
In recent years, there is an increasing interest in high-quality extra virgin olive oils (EVOOs) produced from local cultivars. They have particular chemical/organoleptic characteristics and are frequently subjected to fraud, whereby the control of quality requires a powerful varietal check. In the present research, triacylglycerols (TAGs) and volatiles have been studied as chemical markers for the authentication of EVOO samples from four Italian varieties of Olea europea (Dolce Agogia, Frantoio, Leccino, and Moraiolo). The monocultivar EVOO samples have been subjected to a chemical–enzymatic chromatographic method in order to perform a stereospecific analysis, an important procedure for the characterization of TAG of food products. The results, combined with chemometric analysis (linear discriminant analysis, LDA), were elaborated in order to classify Italian EVOO monocultivar samples. In accordance with the total and intrapositional fatty acid (FA) composition of TAG fraction, the results were allowed to carry out a varietal discrimination. In addition, volatile compounds were also determined by solid-phase micro-extraction gas chromatography-mass spectrometry analysis. All EVOO samples were correctly classified when TAG stereospecific data and volatile results were elaborated by the LDA procedure, even if volatile compounds showed a higher discriminant power. View Full-Text
Keywords: authenticity; olive oil; cultivars; quality; triacylglycerols; volatiles; chemometrics authenticity; olive oil; cultivars; quality; triacylglycerols; volatiles; chemometrics
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MDPI and ACS Style

Blasi, F.; Pollini, L.; Cossignani, L. Varietal Authentication of Extra Virgin Olive Oils by Triacylglycerols and Volatiles Analysis. Foods 2019, 8, 58.

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