PENGARUH PERBEDAAN SUHU PENGERINGAN TERHADAP AKTIVITAS ANTIOKSIDAN DAUN JARAK PAGAR (Jatropha curcas L)

Abstract

Jatropha plant is a plant that contains secondary metabolites, including steroids, phenolics, flavonoids and saponins. Jatropha plants are also known to have antioxidant activity. This study aims to determine the best drying temperature for the antioxidant activity test of jatropha leaves. The antioxidant activity test was carried out by drying test jatripha leaves using ovens with different temperatures, namely temperatures of 40^oC, 50^oC and 60^oC wich was then tested for antioxidant activity using the DPPH method (2-2 diphenyl-picrylhydrazil) using a UV-Vis Spectrophotometer. The results of antioxidant activity testing in Jatropha were obtained, at drying temperature 40^oC IC₅₀ value of 1,868.87 ppm, temperature 50^oC IC₅₀ value of 1,116.97 ppm and temperature 60^oC IC₅₀ value of 319,90 ppm. From the results of the study, it can be concluded that drying samples using an oven at 60^oC has a better IC₅₀ value than drying at 40^oC and 50^oC, which is 319,90 ppm and classified as weak antioxidants.