Author(s):

Sachidananda Swain, Pankhuri Tripathi, G Kavita, MNV Laxmi and T Subramani

Abstract: Since last few decades, there has been an exponential growth in popularising herbal medicine owing to its natural origin and lesser side effects while curing different ailments in the body. The present study was undertaken to reveal the effect of solvent (methanol, ethanol and aqueous) on phytoconstituents and antioxidant activity of Alpinia calcarata rhizome. Methanolic extract had highest phenolic content (21.08 mg/g GAE) followed by ethanolic (17.52) and aqueous extract (8.91 mg/g). DPPH radical scavenging activity was found to be highest in ethanolic extract (83.9%) and lowest in aqueous extract (58.01%). However, ABTS activity was found to be highest in methanolic extract (7.1 mg trolox/g) and lowest in aqueous extract (5.6 mg/g). Similar observations were found for Nitric oxide (NO) and FRAP activity. The metal chelating activity (MCA) was highest in ethanolic extract (84.6%) and lowest in methanolic extract (80.7%). This implied the potentiality ethanolic extract of Alpinia rhizome powder to be used in food and herbal industries for the preparation of nutraceutical compounds and herbal supplements.

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