Barriga-Gonzalez, GChamorro, ESalinas, MModak, BOlea-Azar, C2017-04-282017-04-282016-09J. Chil. Chem. Soc. vol.61 no.3 Concepción Sept. 20160717-9707http://dx.doi.org/10.4067/S0717-97072016000300024http://repositorio.unab.cl/xmlui/handle/ria/3359Indexación: Web of Science; Scielo.The antioxidant capacity has been determined for a number of flavonoid compounds from Heliotropium sinuatum, a plant that grows in arid areas in the north of Chile. The methodologies used were: ORAC(FL) (oxygen radical absorbance capacity - fluorescein), DPPH (2,2-diphenyl-2-picrylhydrazyl) bleaching and electron spin resonance (ESR). These compounds were studied in homogeneous and heterogeneous media. The results showed that the 7-o-methyleriodictiol and 3-o-methylisorhamnetin are those with the highest antioxidant capacity.enORAC(FL)ESRDPPHFlavonoidsMicelleAntioxidantsEVALUATION OF THE ANTIOXIDANT ACTIVITY OF THE FLAVONOIDS ISOLATED FROM HELIOTROPIUM SINUATUM RESIN USING ORACFL, DPPH AND ESR METHODOLOGIESArtículo