ABSTRACT
Phenolic, flavonoid, and tannin content of dried G. mangostana and G. atroviridis were investigated using the well established method, via Ultraviolet-visible (UV-Vis) Spectrometry. Most of the sample extracts of both plants have higher phenolic content, followed by flavonoid and tannin content. Antioxidant activities of dried samples of G. mangostana and G. atroviridis were carried out by using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay. G. mangostana sample extracts have higher antioxidant activity than G. atroviridis. G. mangostana’s leaves in methanol extract showed the highest inhibition percentage (95.72%) followed by G. mangostana’s pericarp (95.43%). G. atroviridis’s stems in the hexane extract showed the lowest inhibition percentage (51.88%). No correlation was observed between the total phenolic, flavonoid, tannin content, and the antioxidant activity.
