Resumen

ORTEGA ROMERO, Elizabeth et al. Physicochemical characterization and evaluation of antioxidant activity of oil from Euterpe precatoria Mart. obtained by different methods of extraction. Rev. Soc. Quím. Perú [online]. 2015, vol.81, n.1, pp.33-43. ISSN 1810-634X.

The fruits of Euterpe precatoria Mart.(acai) were investigated from Yurimaguas-Loreto Department, according to their morphological and proximate analysis; oil was obtained through different methods, evaluating the extraction yield, physicochemical properties and antioxidant activity. The morphological results indicate lengths, diameters and fruit weight equalto1, 324 cm and 1,425cm and 1,797g, respectively. The proximate analysis was performed to dry pulp, which was used to extract the oil. The ash content was similar to that reported for the species Euterpe olaraceae Mart. The total lipid content was higher than that described a lipid content of 11,5% in untreated pulp, but lower than that reported (37%) in other studies. Yield by enzymatic pre-pressing and pressing treatment was 31,9% and 35,3% respectively. However, a statistically significant difference when compared yield was not determined. The solvent extraction yield was 42,6% and was observed differences in color intensity and IC50. The IC50 of the oil obtained by pressing and enzymatic pretreatment was 6,97mg/mL and 3,61mg/mL, respectively; the best result was solvent extraction IC50 1,82 mg/ mL; however, none of the extracts showed greater activity than Trolox(IC 500,001mg/ mL). The total phenolic content of oils obtained was higher than the results reported E.oleracea Mart, with a greater presence of phenolic compounds in the species E.precatoria. Confirming reported to prevalence of phenolic compounds in E.precatoria compared to E.oleraceae.

Palabras clave : Acai; Euterpe precatoria Mart.; extraction of oils; antioxidant capacity.

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