Uji Aktivitas Antioksidan Ekstrak Etanol Kulit Buah Rambutan (Nephelium Lappaceum, L.) Dengan Metode Linoleat-tiosianat

Abstract

People like to eat rambutan and use it as medicine as well. Pericarp of rambutan known contain flavonoid as active compound. Pericarp of rambutan is known to contain flavonoid as an active compound. Based on that fact, the antioxidant activity of ethanol extract of rambutan pericarp (Nephelium lappaceum, L.) was studied using linoleic-thiocyanate method confirming from its free radical linoleic acid formation blocking capacity. Ethanol extract from pericarp of rambutan was obtained from continous extraction method using soxhlet extractor. On this research, series of the ethanol extract of rambutan pericarp and vitamin E (α tocopherol) were 10 μg/ml, 20 μg/ml, 40 μg/ml, 80 μg/ml, and 160 μg/ml. Free radical linoleic acid formation blocking capacity was counted based on absorbance which was measured at λ 499 nm. Data showed the ethanol extract of rambutan pericarp have the same ability with vitamin E in blocking free radical linoleic acid