Oxidation Processes in Sicilian Olive Oils Investigated by a Combination of Optical and EPR Spectroscopy

Gianpiero Buscarino, Maurizio Leone, Valeria Vetri, Maria Montalbano, Vito Foderà, Mariaelena Ricca, Maria Montalbano, Valeria Vetri, Maurizio Leone

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Abstract

Extra virgin olive oil (EVOO) is recognized as one of the healthiest foods for its high content of antioxidants,which forestall and slow down radical formation. Free radical-initiated oxidation is considered one of the main causesof rancidity in fats and oils. As a consequence, reliable protocols for the investigation of oil oxidation based on selective,noninvasive, and fast methods are highly desirable. Here we report an experimental approach based on UV-Vis absorbance,steady-state fluorescence, and electron paramagnetic resonance (EPR) spectroscopy for studying oxidation processesinduced by temperature for a period up to 35 d on Sicilian EVOO samples. We followed the decrease in β-carotenecontent during incubation time and observed changes in polyphenols and tocopherols during the oxidation processes,focusing on the time scale of those changes. Using EPR spectroscopy, the free radical formation in different oil samplesis reported, providing a fingerprint for both the antioxidant content and temporal features of the oxidation process at itsearly stage.
Lingua originaleEnglish
pagine (da-a)C1-C6
Numero di pagine6
RivistaJournal of Food Science
Volume00
Stato di pubblicazionePublished - 2012

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All Science Journal Classification (ASJC) codes

  • Food Science

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