G69QWBAW

3696

3 mai 2021 15:24

3 mai 2021 15:24

Extra virgin olive oil (EVOO) is defined as a functional food as it contains numerous phenolic components with well-recognized health-beneficial properties, such as high antioxidant and anti-inflammatory capacity. These characteristics depend on their structural/conformational behavior, which is largely determined by intra- and intermolecular H-bond interactions. While the vibrational dynamics of isolated compounds have been studied in a number of recent investigations, their signal in a real-life sample of EVOO is overwhelmed by the major constituent acids. Here, we provide a full characterization of the vibrational spectroscopic signal from commercially available EVOO samples using Inelastic Neutron Scattering (INS) and Raman spectroscopies. The spectra are dominated by CH2 vibrations, especially at about 750 cm−1 and 1300 cm−1. By comparison with the spectra from hydroxytyrosol and other minor phenolic compounds, we show that the best regions in which to look for the structure–activity information related to the minor polar compounds is at 675 and 1200 cm−1 for hydroxytyrosol, and around 450 cm−1 for all minor polar compounds used as reference, especially if a selectively deuterated sample is available. The regional origin of the EVOO samples investigated appears to be related to the different amount of phenolic esters versus acids as reflected by the relative intensities of the peaks at 1655 and 1747 cm−1.

None

• AB - Transversal
• FREDO qualité des produits
• FREDO technologie et innovation
• GEO Italie
• huile
• olive

• raman spectroscopy
• UV-Vis spectroscopy
• extra virgin olive oil
• inelastic neutron scattering
• minor polar compounds

Antioxidants

10

643

2021/5

4 mai 2021

10.3390/antiox10050643 Le DOI est une URL unique de référencement d'une publication. Il est donc plus fiable et permanent qu'une URL classique