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Soft-deodorization of virgin olive oil: Study of the changes of quality and chemical composition
Ramón Aparicio-Ruiz1, Inmaculada Romero1, Diego L García-González1
1Instituto de la Grasa (CSIC), Campus Universidad Pablo de Olavide - Edificio 46, Ctra. de Utrera, km. 1, 41013 Sevilla, Spain.
Abstract:
The potential adulteration of extra virgin olive oil (EVOO) with soft-deodorized virgin olive oil (VOO) has raised the interest of researchers in investigating this fraud in recent years. The objective of this study was to determine chemical changes occurring after a soft-deodorization process in terms of volatiles, fatty acid ethyl esters (FAEEs) and pyropheophytins (PPPs) concentrations in VOOs. After testing several conditions (80, 100 and 130°C, for 30 and 60min), the parameters of 100°C and 60min were considered as the optima. These conditions allowed removing volatiles responsible for sensory defects with low losses of total phenols (14%-32%), and values of PPPs (11.83%) and FAEEs (34.53mg/kg) lower than the limits of standard regulations. The experiments show that soft-deodorized VOOs could be added up to 50% to EVOOs and current standard methods would not detect this kind of adulteration.
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