Enhanced extraction of flavonoids from Odontonema strictum leaves with antioxidant activity using supercritical carbon dioxide fluid combined with ethanol
| Autor: | Cedric Dicko, Estera Szwajcer Dey, Félix B. Kini, Yvonne L. Bonzi-Coulibaly, Jean Claude W. Ouédraogo |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Ethanol Supercritical carbon dioxide Antioxidant Chromatography biology 010405 organic chemistry General Chemical Engineering medicine.medical_treatment Extraction (chemistry) Flavonoid 04 agricultural and veterinary sciences Condensed Matter Physics biology.organism_classification 040401 food science 01 natural sciences Supercritical fluid 0104 chemical sciences chemistry.chemical_compound 0404 agricultural biotechnology chemistry medicine Physical and Theoretical Chemistry Solvent extraction Odontonema strictum |
| Zdroj: | The Journal of Supercritical Fluids. 131:66-71 |
| ISSN: | 0896-8446 |
| DOI: | 10.1016/j.supflu.2017.08.017 |
| Popis: | Flavonoids were extracted from Odontonema strictum leaves by supercritical carbon dioxide, with ethanol. The effect of three independents variables (time, pressure and temperature) on the Total Flavonoid Content (TFC) were optimized by factorial investigation. The TFC and flavonoid recovery varies respectively from 99.33 to 247.78 mg/g of dried extract and 10.68–18.92 mg/g of dried leaves powder, while the conventional solvent extraction (CSE) yielded 36.45 mg/g and 3.13 mg/g. Analysis of the factorial identified the optimal conditions with an extraction time of 270 min and a pressure of 200 bar, the temperature had no effect within the tested ranges. The predicted TFC was 203.11 mg/g under optimal conditions and experimentally 230.48 mg/g. The antioxidant activity with 2,2-Diphenyl-1-picrylhydrazyl method of the extracts under optimum conditions was 49.21% while the CSE extract was 37.05%. The TLC analysis of the supercritical fluid extracts from the optimum conditions showed 5 majors flavonoids. |
| Databáze: | OpenAIRE |
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