Valoración de la actividad antioxidante de los subproductos de naranja

Abstract

The present study evaluate the richness of albedo, zest, exhausted pulp and a complete by-product of orange as a source of antioxidants and the effect of dehydration on the antioxidant capacity. Samples were from the province of Manabí and were analyzed in fresh and after the dehydration process at 60°. The total phenolic content was measured by the Folin-Ciocalteu method and the antioxidant richness was evaluated by ABTS, DPPH and FRAP methods. Fresh albedo (1391 mg Eq. AG / 100g BS) and dehydrated flavedo (788mg Eq. AG / 100g BS) showed highest total phenol content according to Folin-Ciocalteu. The highest concentration of antioxidant capacity in fresh and dried samples according to the DPPH fresh complete product (255μmol EQ. Trolox /g BS) and flavedo dehydrated (68μmol EQ Trolox / g BS.), ABTS fresh and dehydrated complete by-product (222 and 183μmol EQ Trolox / g BS respectively) and FRAP fresh flavedo (65 mol EQ Trolox / g BS) and complete by- product dehydrated (EQ 49 mol Trolox / g BS) it was determinated that in the albedo, zest and complete by-product the effect of dehydration caused a decrease of antioxidant activity and an increased in exhausted pulp using DPPH method.