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Title: Revisiting 3D Van Krevelen diagrams as a tool for the visualization of volatile profile of varietal olive oils from Alentejo, Portugal
Authors: Martins, Nuno
Jiménez-Morillo, Nicásio
Freitas, Flávia
Garcia, Raquel
Gomes da Silva, Marco
Cabrita, Maria João
Keywords: Volatile compounds
monovarietal olive oils
Chemometric analysis
3D van Krevelen diagram.
Issue Date: 2020
Publisher: Talanta - Elsevier
Abstract: This paper aims to study the volatile composition of monovarietal extra-virgin olive oils from different varieties from Alentejo (Portugal). Volatile profile of 82 olive oils was performed by head-space solid phase micro-extraction hyphenated with gas chromatography/mass spectrometry (HS-SPME-GC/MS). A total of 107 volatile compounds, belonging to several class of compounds, like aldehydes, hydrocarbons, alcohols, terpenoids, ketones, sulphurous compounds, acids and esters were identified, assigned to a specific biogenic origin and total abundances were plotted in modified 3D van Krevelen diagrams. The 3D plots showed that there are compositional differences among olive oil varieties. Discriminant analysis confirmed that the pattern of volatile compounds includes enough information to predict sample variety amongst discrete monovarietal olive oil. Combining statistical analysis (t-Student) and graphical-tools (van Krevelen diagram) seems to be a powerful tool to determine what molecular families were characteristic of each olive oil variety, contributing to the valorization of monovarietal Portuguese olive oil.
Type: article
Appears in Collections:MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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