Polvo concentrado de antioxidantes de hojas de Ilex Guayusa usando extracción alcohólica y extracción asistida con CO2 supercrítico

Abstract

Abstract: The present research has been developed to obtain a concentrated antioxidant powder from Ilex guayusa leaves using alcoholic extraction and extraction assisted with supercritical CO2. The effect of pressure, supercritical CO2 temperature and PVP polymer ratio were evaluated on the yield of the precipitated extract, total phenol content by the Folin-Ciocalteu method, antioxidant capacity by the DPPH method, inhibition percentage and the distribution of the particle size using SEM scanning electron microscopy. The humidity of the dehydrated guayusa leaves was 1.05 ± 0.16%. The yield percentage was 74.72%; content of total phenols 25014.634 mg EAG / 100g plant and an antioxidant activity 3905.45 uM ET / g by the DPPH method. The results showed that pressure and temperature do not affect performance, in the same way it was determined that temperature, pressure and the relationship with the polymer had no effect on the total phenol content.