Evaluación del poder antioxidante de una microemulsión conteniendo quercetina y aceites esenciales mediante un método optimizado de análisis Evaluation of the antioxidant ability of a microemulsion containing quercetin and essential oils through an optimized method of analysis

This study has determined the antioxidant ability of a microemulsion containing quercetin 0.45 wt% combined with essential oils of rosemary and cidron (Rosmarinus officinalis and Lippia alba, respectively), using the method of stable free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH). Moreover we assessed the influence of various alcohols as a reaction medium when this method is employed, monitoring the stability of the radical in the solvent, the kinetics of the reaction, percent of inhibition (% I) of DPPH by antioxidant and the IC50, using spectrophotometry UV-Visible at a wavelength of 517 nm. The method is optimized taking into account the solubility of the vehicle (microemulsion) and the active ingredients (quercetin and essential oils).