Evaluation of Total Phenolic, Flavonoid Content and Antioxidant Capacity of Different Parts of Averrhoa carambola L.

Abstract

Averrhoa carambola L. belonging to the Oxalidaceae family has fruits with attractive star shape. Total
phenolic and flavonoid content and antioxidant capacity of various parts of A. carambola have been studied to
explore active extracts for novel antioxidant compounds. Methanol extract of bark contained the highest amount of
phenolic constituent (125 mg GAE/g of dry extract). However, hexane, dichloromethane and methanol extracts
contained the maximum number of flavonoids and were 45, 92 and 72 mg QE/g of dry extract, respectively. Since the
bark possessed the highest antioxidant capacity, it contained more phenolic compounds than other extracts of fruits
and leaves. Total antioxidant capacity of hexane, dichloromethane and methanol extracts of bark were 62, 117 and
151 mg AAE/g of dry extract, respectively. The results recommend that the bark part can be a good source of
phenolic compounds as it showed the highest antioxidant capacity. The fruit and leave parts are also rich sources of
antioxidant compounds.