Antioxidant Activity and Phytochemical Identification of Annona Squamosa Leaves Methanolic Extracts

The antioxidant activity of Annona squamosa (A. squamosa) leaf was carried out using methanol extract and fractionated extract namely n-hexane, ethyl acetate and residue. The antioxidant activity of methanol extract and fractionated was performed using the 1-diphenyl-2-Pycrilhydrazil (DPPH) method. The antioxidant activity test of methanol extract and fractionated n-hexane, ethyl acetate and residue yielded IC₅₀ of 6.87, 169.99, 31.55 and 44.75 ppm. The ethyl acetate fraction extract with IC₅₀ 31.55 ppm was performed by column chromatography using silica gel G60 as the stationary phase and n-hexane: ethyl acetate as the mobile phase. The results of column chromatography obtained 181 fractions and were combined based on the stain pattern into 4 subfractions. Antioxidant test of each subfraction showed that the ASE 3 subfraction had the strongest antioxidant activity. Furthermore, the subfraction was analyzed using Gas Chromatography Mass Spectrometry (GC-MS). According, GC-MS data analysis showed that the third subfraction contained 19 phytochemical compounds, where 3 compounds having the highest concentration, namely 4,4'-((p-Phenylene)diisopropylidene) diphenol, dodecanoic acid, methyl ester and phthalic acid, isobutyl 2-methylpent-3-yl ester.