DETERMINATION OF THE ANTIOXIDANT ACTIVITY OF Buddleja inkana, Oreocallis grandiflora and Chuquiraga spinose LEAF EXTRACTS

Abstract

In order to use native plant extracts in medicinal, cosmetic, anticorrosive and other applications; the objective of these work was to evaluate the antioxidant activity, as well as the content of flavonoids and total phenolic compounds of the ethanolic and hydroalcoholic extracts of the leaves of Buddleja inkana (quisuar), Oreocallis grandiflora (cucharilla) and Chuquiraga spinose (huamanpinta). The measurement of antioxidant activity: FRAP, DPPH and ABTS·+, as well as the content of flavonoids and total phenolic compounds, was carried out by the microplate reader method. The results when evaluating the antioxidant activity of ethanolic and hydroalcoholic solutions at 75 and 50 % (v/v) in ethanol extracts showed that the extracts of Oreocallis grandiflora showed a higher antioxidant activity than Buddleja inkana and Chuquiraga spinosa, and that the hydroalcoholic extracts at 75 % (v/v) ethanol were the extracts with high antioxidant activity, probably associated with the solvent, since these extract also presented the highest concentrations of total phenolic compounds.