Lavionda, Sheryl Sesari2023-06-272023-06-272023-04PerpustakaanElfitrahttps://repository.unri.ac.id/handle/123456789/11045Pyrrosia longifolia is an epiphytic plant on polypodiaceae family. This species has underreported, while other species such as P. petiolosa and P. lancelota have been reported as sources of antioxidants. Antioxidants have an important role in maintaining health because they can capture free radical molecules which are the causes of various diseases. This study aims to determine the antioxidant activity of extract of P. longifolia. Analysis the results antioxidant activity test on n-hexane extract had IC50 782,68 μg/mL, dichloromethane had IC50 81,49 μg/mL, ethyl acetate had IC50 28,22 μg/mL and water had IC50 90,22 μg/mL. It was concluded that the extract of n-hexane showed very weak antioxidant activity and dichloromethane, ethyl acetate and water showed strong antioxidant activity.enantioxidantfree radicalPyrrosia longifoliaArticle