To differentiate extra virgin olive oils (EVOO) according to the origin of purchase, such as monocultivar Italian EVOO with protected denomination of origin (PDO) and commercially-blended EVOO purchased in supermarkets, a number of samples was subjected to the analysis of various lipid species by liquid chromatography/mass spectrometry (LC-ESI-MS/MS, LC-ESI-IT-MS) and proton nuclear magnetic resonance analysis (1H-NMR). Many putative chemical markers were extracted as differentiators by uni- and multivariate statistical analysis. Commercially-blended EVOO contained higher concentrations of the majority of minor lipids, including free fatty acids, their alkyl (methyl and ethyl) esters, monoglycerides, and diglycerides, which may be indicative of a higher degree of triglyceride lipolysis in these than in monocultivar PDO EVOO. Triterpenoids and particular TAG species were also found in higher proportions in the samples from the commercially-blended EVOO class, suggesting a possible influence of factors such as the cultivar and geographical origin. The largest differences between the classes were determined for the concentrations of uvaol and oleanolic acid. The results of the analysis by isotopic ratio mass spectrometry (IRMS) were reasonably consistent with the information about the geographical origin declared on the labels of the investigated EVOOs, showing considerable variability, which possibly also contributed to the differences in lipid composition observed between the two investigated classes of EVOO.

Lipid Profiling and Stable Isotopic Data Analysis for Differentiation of Extra Virgin Olive Oils Based on Their Origin / Lukić, Igor; Da Ros, Alessio; Guella, Graziano; Camin, Federica; Masuero, Domenico; Mulinacci, Nadia; Vrhovsek, Urska; Mattivi, Fulvio. - In: MOLECULES. - ISSN 1420-3049. - 2020, 25:1(2020), pp. 1-20. [10.3390/molecules25010004]

Lipid Profiling and Stable Isotopic Data Analysis for Differentiation of Extra Virgin Olive Oils Based on Their Origin

Guella, Graziano;Camin, Federica;Masuero, Domenico;Vrhovsek, Urska;Mattivi, Fulvio
2020

Abstract

To differentiate extra virgin olive oils (EVOO) according to the origin of purchase, such as monocultivar Italian EVOO with protected denomination of origin (PDO) and commercially-blended EVOO purchased in supermarkets, a number of samples was subjected to the analysis of various lipid species by liquid chromatography/mass spectrometry (LC-ESI-MS/MS, LC-ESI-IT-MS) and proton nuclear magnetic resonance analysis (1H-NMR). Many putative chemical markers were extracted as differentiators by uni- and multivariate statistical analysis. Commercially-blended EVOO contained higher concentrations of the majority of minor lipids, including free fatty acids, their alkyl (methyl and ethyl) esters, monoglycerides, and diglycerides, which may be indicative of a higher degree of triglyceride lipolysis in these than in monocultivar PDO EVOO. Triterpenoids and particular TAG species were also found in higher proportions in the samples from the commercially-blended EVOO class, suggesting a possible influence of factors such as the cultivar and geographical origin. The largest differences between the classes were determined for the concentrations of uvaol and oleanolic acid. The results of the analysis by isotopic ratio mass spectrometry (IRMS) were reasonably consistent with the information about the geographical origin declared on the labels of the investigated EVOOs, showing considerable variability, which possibly also contributed to the differences in lipid composition observed between the two investigated classes of EVOO.
1
Lukić, Igor; Da Ros, Alessio; Guella, Graziano; Camin, Federica; Masuero, Domenico; Mulinacci, Nadia; Vrhovsek, Urska; Mattivi, Fulvio
Lipid Profiling and Stable Isotopic Data Analysis for Differentiation of Extra Virgin Olive Oils Based on Their Origin / Lukić, Igor; Da Ros, Alessio; Guella, Graziano; Camin, Federica; Masuero, Domenico; Mulinacci, Nadia; Vrhovsek, Urska; Mattivi, Fulvio. - In: MOLECULES. - ISSN 1420-3049. - 2020, 25:1(2020), pp. 1-20. [10.3390/molecules25010004]
File in questo prodotto:
File Dimensione Formato  
Lukic_et_al_Molecules_2020.pdf

accesso aperto

Descrizione: articolo principale
Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Creative commons
Dimensione 2.19 MB
Formato Adobe PDF
2.19 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/248109
Citazioni
  • ???jsp.display-item.citation.pmc??? 7
  • Scopus 21
  • ???jsp.display-item.citation.isi??? 17
social impact