Compuestos fenólicos y actividad antioxidante de extractos hidroalcohólicos y acuosos de frutos de Prosopis pallida “algarrobo”

Abstract

The fruits of the "algarrobo" contain phenolic compounds (PC) to which important nutraceutical properties are attributed. The objective of the present study was to quantify PC and antioxidant activity (AA) in five fruit extracts of Prosopis pallida (Humb. & Bonpl.ex Willd.) Kunth from the regions of Tumbes, Piura, Lambayeque and La Libertad. Three hydroalcoholic extracts were evaluated (45%, 70% and 96% ethanol), and two aqueous extracts (infusion and decoction). The PC were quantified by the Folin-Ciocalteu method and the AA was evaluated by the DPPH, FRAP and ABTS methods. The best extract with PC was ethanol 96% of the fruits of Piura with 58.03 ± 2.5 mg Gallic acid equivalents/g. The AA fluctuated between 5.27±0.30- 2.12±0.08; 8.46±0.45-5.32±0.34 and 17.63±0.53-11.16±0.29 mg of Trolox equivalents/g, for DPPH, FRAP and ABTS, respectively. It is concluded that hydroalcoholic and aqueous extracts have PC with differentiated AA for each region.

Keywords

• phenolic compounds
• antioxidant
• prosopis pallida
• dpph
• frap
• abts.