Identifikasi senyawa bioaktif pada fraksi ekstrak rumput laut merah (Eucheuma cottonii)

Seaweed is a biological resource that rich in nutrients and bioactive compounds. This study aims to determine qualitatively quantitatively the compounds (flavonoids, alkaloids, steroids/terpenoids, saponins phenols) from extracts fractions of Eucheuma cottonii. The method used an experiment by conducting series experiments extracting fractionating E. cottonii data were analyzed descriptively. treatments organic solvents with different polarity levels (methanol, n-hexane, ethyl acetate, butanol) for extraction fractionation. Parameter analysis consisted qualitative phytochemical tests determined total content flavonoids, saponins. results test methanol extract produced n-hexane fraction containssteroids/terpenoids acetate contains flavonoids steroids/terpenoids butanol alkaloids. quantitative showed was 0.23%, alkaloids 0.16% 0.09% fraction, while alkaloid fractio.Keywords: fractionation, solvent, phytocemical,