Effect of agitation on extraction of phenolic compounds from ripe pericarp of Wodyetia bifurcata

Abstract

In this study, the ripe pericarp extracts of Wodyetia bifurcata were prepared by solvent extraction techniques with and without agitation. The influence of agitation was examined on the extraction yield, total phenolic content (TPC), total flavonoid content (TFC) and antioxidant activity of the ripe pericarp extracts of Wodyetia bifurcata. Antioxidant capacity of extracts was evaluated by measuring the scavenging effect on 2, 2’-azinobis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and 2, 2’-diphenyl-1-picrylhydrazyl (DPPH) radicals. Compared to solvent extraction without agitation, solvent extraction with agitation significantly (p < 0.05) increased the extraction yield, TPC, TFC and antioxidant capacities (ABTS and DPPH) of the ripe pericarp extracts of Wodyetia bifurcata. In addition, higher agitation speed resulted in higher extraction yield, TPC, TFC and antioxidant activities (ABTS and DPPH) of the ripe pericarp extracts of Wodyetia bifurcata.