Aktivitas Antioksidan Ekstrak Perasan Daun Manggis (Garcinia Mangostana L.) Berdasarkan Metode Dpph (2,2 Diphenyl-1-phycryl Hydrazil)

Garcinia mangostana L is one of the main power plant that has natural antioxidants that are known to inhibit the scavenging free radicals.This study aims to Prove the ability of the antioxidant activity leaf juice extract of mangosteen leaves (Garcinia mangostana, L), the ratio of antioxidant activity between extract juice of mangosteen leaveswith positif control. Concentration of a substance in the juice extract of mangosteen leaves is determined by the DPPH method using UV-Vis spectrophotometry. It aims to determine the antioxidant activity of extract juice of mangosteen leaves using parameters Inhibition Concentration (IC50) which can cause loss of 50% DPPH as free radical. .The antioxidant activity of extract juice of mangosteen leaves has IC50 of 19.3708 ppm it shows that at these concentrations has 50% inhibition of DPPH free radical activity, and the vitamin E has a positive control ofa positivencontrol C50 2,146 ppm.These results indicate mangosteen juice extract of mangosteen leaves is lower than 9 times the antioxidant activity of a positive control. Based on the results of T test showed that extract juice of the mangosteen leaves and positive controls are different. Antioxidant activity from juice extract of mangosteen leaves is very strong with IC50 values of less than 50. Key words : Mangosteen leaves, juice ,antioxidant, DPP