ANALISIS KADAR FENOLIK, FLAVONOID DAN AKTIVITAS ANTIOKSIDAN EKSTRAK METANOL SERBUK HARENDONG (Melastoma affine D. Don), SINTRONG (Crassocephalum crepidiodes) DAN JONGE (Emilia sonchifolia

Harendong, Sintrong and Jonge are weeds that are usually found in the Research Institute For Tea and Cinchona Gambung. Gambung society is accustomed to consuming Harendong, Sintrong and Jonge leaves as lalab. The purpose of this research was to determine and study phenolic, flavonoid, and antioxidant activity found in methanol extracts of Harendong, Sintong and Jonge powders. Provide information to researchers and the public about phenolic levels, flavonoids and antioxidant activity of Harendong, Sintrong and Jonge powders. The research method used in this research was the Folilin-Ciocalteu method for the analysis of phenolic value with gallic acid standards, analysis of flavonoid value with quercetin standard by spectrophotometer method and antioxidant activity by the method 1,1-diphenyl-2-picrylhydrazil (DPPH). The results showed that concentrations of phenolic concentrated extracts of methanol from Harendong, Sintrong and Jonge powder were 227.08 mg GAE / g, 48.10 mg GAE / g and 16.92 mg GAE / g, severally. The value of flavonoid compounds of methanol extract of Harendong, Sintrong and Jonge powder were severally 13.35 mg RE / g, 7.40 mg RE / g and 11.12 mg RE / g. The higher value of phenolic compounds and flavonoid compounds, the higher the potential for antioxidant activity. Antioxidant activity is expressed in IC50 values. IC50 values of methanol extract of Harendong, Sintrong and Jonge powder were 44.94 ppm, 50 ppm and 125.66 ppm respectively. The smaller the IC50 value, the higher the antioxidant activity. From the correlation coefficient value, it was found that 65.75% of antioxidant activity was influenced by phenolic compounds and 8.77% of flavonoid compounds. Keywords: Methanol, Harendong, Sintrong, Jonge, phenolic compounds, flavonoid compounds, antioxidant activity, DPP