Evaluation of antioxidant activity of Alpinia purpurata rhizome (Vieill)

Abstract

Research field with endless potential is especially important in countries possessing great interest to identify anti-oxidant compounds that are pharmacologically potent and have low or no side effects for use in preventive medicine and the food industry. As plants produce significant amount of antioxidants to prevent the oxidative stress caused by photons and oxygen. The present study investigates the quantitative analysis of secondary metabolites and antioxidant activity of three various extracts of Alpinia purpurata rhizome. Using DPPH, ABTS and Ferric reducing antioxidant power assay FRAP to investigate the antioxidant potential of crude extracts. The extracts showed the inhibition in a dose dependant manner. The results were expressed as IC₅₀ values, considering the growing interest in assessing the antioxidant capacity of herbal medicine. The ethanolic extract of Alpinia purpurata rhizome exhibited a DPPH radical scavenging higher activity, FRAP and ABTS.