Sayyidatus, Salmi (2016) ISOLASI DAN KARAKTERISASI SENYAWA FLAVONOID DARI FRAKSI AKTIF EKSTRAK DAUN ASHOKA (Polyalthia longifolia (Sonn.)Thwaites) SEBAGAI ANTIOKSIDAN. Diploma thesis, Universitas Andalas.
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Abstract
The isolation of flavonoid compound from ashoka leaves (Polyalthia longifolia (Sonn.)Thwaites) has been done. The isolation was done with maceration method using hexane, ethyl acetate and methanol as the solvent. Antioxidant activity of each extract was determine using free radikal 1-1-diphenyl-2-pikrilhidrazil (DPPH) method that methanol extract was the most active as the antioxidant with the IC50 value was 24,99 mg/L. Methanol extract was coloum chromatographied by using silika gel as the stasionary phase and hexane, ethyl acetate and methanol as the mobhile phase with SGP method. The isolated compound is a flavonoid, formed yellow solid and has hydroxyl groups at C4’, C7 and C5. Key Words: Polyalthia longifolia (Sonn.)Thwaites., Flavonoid, Antioxidant
| Item Type: | Thesis (Diploma) |
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| Subjects: | Q Science > QD Chemistry |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia |
| Depositing User: | s1 kimia kimia |
| Date Deposited: | 29 Mar 2016 03:55 |
| Last Modified: | 29 Mar 2016 03:55 |
| URI: | http://scholar.unand.ac.id/id/eprint/3921 |
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