Recuperación de antocianinas a partir de los residuos agroindustriales de la mora de castilla

Abstract

Tungurahua being one of the provinces with the highest production of blackberry, the idea of recovering anthocyanins from the agroindustrial waste of this fruit, arises as a topic of vital importance, since the bioactive substances that are present in the skin of the blackberry, not only give the characteristic color and flavor to the fruit, but also have antioxidant properties and great benefits for human health. For the extraction of anthocyanins, 96 percent ethanol was used as a solvent, to which citric acid was added to preserve the stability of these bioactives against factors that could affect their integrity. Subsequently, they were microencapsulated with maltodextrin to preserve the activity of the bioactive, thus prolonging their useful life, to finally determine the antioxidant activity of the anthocyanins. It was determined that the optimum conditions to obtain the highest amount of anthocyanins were 1:15 plant material - solvent volume for 30 minutes. In the microencapsulation process, it was obtained an efficiency of 78.178 percent, indicating effective microencapsulation. On the other hand, in the determination of the antioxidant activity, it was obtained 55.606 percent DPPH inhibition in the concentrate (Trolox referent of 311.711 micromol per liter) and 29.342 percent in the microencapsulated (Trolox referent of 205.550 micromol per liter), taking into account that in this value there is only 20 percent of the concentrate. This process represents a significant advance in the valorization of agro-industrial waste and the sustainable production of bioactive compounds.