Antioxidant activity, total flavonoid, and total tannin content of ethanol extract of avocado peel (Persea americana Mill.)

Background: Avocado is a plant that can grow in tropical climates. In general, people only consume the fruit while skin and seeds are not used. fruit, contain secondary metabolites such as flavonoids tannins which have antioxidant activity. Objective: To determine activity, total flavonoid, tannin content of ethanol extract avocado peel. Methods: P. americana Mill. was collected from Lubuk Linggau, South Sumatra. The peel obtained by maceration with ethanol. Qualitative analysis using Mg HCl FeCl3. Determination flavonoid carried out AlCl3 reagent Folin-Ciocalteu to measured UV-Vis Spectrophotometer. activity DPPH method. Result: results qualitative showed contained tannins. It also had IC50 41,93 µg/mL. it were 125,01 mgQE/g 53,82 mgTAE/g respectively. Conclusion: Ethanol compounds higher than Keywords: antioxidant, DPPH,