In the present study, the oxidative stability of extra virgin olive oil-based oleogels developed with beeswax, glycerol monostearate and ethylcellulose as gelators was determined using DSC in non-isothermal mode. Samples were heated at different heating rates (5, 7.5, 10, 12.5, 15 °C/min) and, by using the Ozawa-Flynn- Wall method, oxidation kinetics parameters such as activation energy, pre-exponential factor and oxidation rate constant were evaluated. The results highlighted that glycerol monostearate-based oleogels have the highest oxidative stability, followed by ethylcellulose-based oleogel. However, bulk extra virgin olive oil showed higher stability than beeswax-based oleogel, probably due to the presence in the wax of minor components with prooxidant activity.
Study of Heat Resistance of Extra Virgin Olive Oil – Based Oleogels by Differential Scanning Calorimetry
Francesca Malvano
;Arianna Lavorgna;Rossella Francesca Lanza;Francesco Marra;Donatella Albanese.
2023
Abstract
In the present study, the oxidative stability of extra virgin olive oil-based oleogels developed with beeswax, glycerol monostearate and ethylcellulose as gelators was determined using DSC in non-isothermal mode. Samples were heated at different heating rates (5, 7.5, 10, 12.5, 15 °C/min) and, by using the Ozawa-Flynn- Wall method, oxidation kinetics parameters such as activation energy, pre-exponential factor and oxidation rate constant were evaluated. The results highlighted that glycerol monostearate-based oleogels have the highest oxidative stability, followed by ethylcellulose-based oleogel. However, bulk extra virgin olive oil showed higher stability than beeswax-based oleogel, probably due to the presence in the wax of minor components with prooxidant activity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
