Differences in Parts of Purslane Plants (Portulaca grandiflora Hook.) To Total Phenolic and Flavonoid Content and Antioxidant Activity

Abstract

Antioxidant are needed to prevent free radical inside the body and oxidative stress that promotes the aging process and various degenerative diseases. Portulaca grandiflora Hook. is known to have potential as antioxidant. Differences in plant parts can cause differences in phytochemical content, which can affect its antioxidant activity. This study aims to measure total phenolic and flavonoid content in leaf, old stem, young stem, and flower organs of purslane plant (Portulaca grandiflora Hook.) which is extracted using ethanol 96% and determined the antioxidant activity of the extract with DPPH methode. The result showed that each plant organ of purslane contains different concentration of phenolic and flavonoid compounds. The highest total phenolic and flavonoid content was found in the leaves( 113.26 ± 3.85 mg GAE/g and 97.99 ± 1.28 mg QE/g), but the highest antioxidant activity was found in the old stem with IC₅₀ value 122.15 ± 1.30 ppm (classified as medium antioxidant).

Keywords: Antioxidant, Flavonoid, Phenolic, Portulaca grandiflora Hook.