Ricerc@Sapienza

A screen-printed electrode was modified using multi-walled carbon nanotubes (MWCNT) and titanium oxide nanoparticles (TiO2), with a bio-based ionic liquid (RTIL) as a drop-casting medium. The RTILs here used have been proved to be useful for immobilizing nanomaterials on the working electrode surface. The proposed platform has been used to analyze extra-virgin olive oils (EVOOs), produced with olives of known cultivar and geographic origin. The EVOOs were produced with the olives that have been collected in the Italian region of Lazio during 2016, 2017 and 2018 harvesting seasons.

Olive oil contains many different compounds which are responsible for its nutritional and sensorial value. However, some compounds present in olive oil at very low amounts have not yet been identified. Here, the detection of tetrahydrogeranylgeraniol and dihydrogeranylgeraniol, in both the total aliphatic alcohol and waxy fractions of extra virgin olive oil, is reported for the first time using GC and GC-MS methodologies.

La grande potenzialità della risonanza magnetica nucleare nell’analisi degli olii di
oliva è ben nota [1] e dipende: a) dall’assenza di veri trattamenti chimici, b) dalla
costanza della risposta strumentale (buona riproducibilità), c) dalla rapida acquisizione
di molti dati, d) la quantificazione viene basata su una risposta chimico-fisica
dipendente solo dal momento magnetico nucleare che teoricamente rende le misure
quantitative valide in senso assoluto.[2] Per il rilevamento di composti minori, i noti

The powerful features of the NMR analyses on olive oils in well established since decades ago and is to: lack of chemical tratments, costant instrumental outcome ( good reproducibility), quick acqusition of a great amount of data.