Antioxidants are substances produced by the body in small amounts. Antioxidants could be obtained from seaweeds' bioactive compounds. Seaweeds' bioactive materials include sulfate polysaccharides, proteins, pigments caretonoid, polyunsaturated fatty acids (PUFA), essential minerals, vitamins and other secondary metabolites. The aim of this research is to determine the antioxidant properties using DPPH radical scavenging method from the extracts of K. alvarezii, E. spinosum and Sargassum sp.. The experiment was conducted using three species of seaweeds (K. alvarezii, E. spinosum and Sargassum sp.) which were extracted with three different polarity solvents (n-hexane, ethyl asetate and ethanol). The results showed the presence of the antioxidant activity in various extraction of seaweeds. Inhibitor to DPPH Free Radical activity were shown in 100 ppm by extracts Sargassum sp. (etil asetat) 23.8 0.7 %, Sargassum sp. (ethanol) 11.7 0.4%, K. alvarezii (etil asetat) 14.7 0.4%, K. alvarezii (ethanol) 14.9 0.4%, E. spinosum (etil acetate) 12.1 0.4%, E. spinosum (ethanol) 12.0 0.4%, and BHT 58.5 3.1%. All of the n-hexane extracts of the seaweeds had no antioxidant activities when being treated by qualitative of DPPH methods.

Original languageEnglish
Article number012034
JournalIOP Conference Series: Earth and Environmental Science
Issue number1
Publication statusPublished - 26 Feb 2021
Event1st International Conference on Biotechnology and Food Sciences, INCOBIFS 2020 - Surabaya, Virtual, Indonesia
Duration: 11 Sept 2020 → …


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