Antioxidant Activity of Anthocyanin-Rich Colombian Tropical Fruits

摘要

Total anthocyanin content of five Colombian tropical fruits was measured for the first time, and their antioxidant activity was determined by using EPR (Electron Paramagnetic Spectroscopy). A second-order kinetic model was applied to the free radical scavenging reaction under presence of ABTS and DPPH free radicals to compare their antioxidative potential. The total monomeric anthocyanin content of corozo (Bactris guineensis), motilon (Hyeronima macrocarpa Muell. Arg.), coral (Hyeronima macrocarpa Mull. Arg.), "uva de arbol" (Myrciaria aff. cauliflora), and "mora pequena" (Rubus megalococcus Focke.) was determined by the pH-differential method. The anthocyanin-rich extracts of motilon and corozo exhibited not only the highest anthocyanin content but also the highest antioxidant potential.