Antioxidant Activity of Leaf, Stem and Flower of Ixora Coccinea Plants by Using Hydrogen Peroxide Scavenging Assays

In this paper, we studied antioxidant activity of the ethanolic extract of leaf, stem and flower of Ixora coccinea plants by using the hydrogen peroxide scavenging assay. Initially qualitative analysis of some phytochemical parameters, it was revealed that the extract of an Ixora coccinea plants parts possesses the contents of flavonoids, phenols, alkaloids and tannin. It gave significant activities in all antioxidant assays compared to the standard antioxidant in a dose dependent manner and remarkable activities to scavenge reactive oxygen species may be attributed to the high amounts of flavonoids and phenol contents. In hydrogen peroxide scavenging assay, % of leaf inhibition value is 87.40 % at 500 µg ml-1 concentration, while for % of stem and % of flower inhibition value is 84.40 % and 83.90 % respectively. However, Ixora coccinea extract showed strong reducing power and total antioxidant capacity.