Supercritical CO2 extraction of antioxidants from Paulownia elongata x fortunei leaves
| Autor: | Paula Rodríguez-Seoane, Herminia Domínguez, Beatriz Díaz-Reinoso |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Ethanol
Supercritical carbon dioxide Chromatography biology Renewable Energy Sustainability and the Environment 020209 energy Extraction (chemistry) Supercritical fluid extraction Paulownia 02 engineering and technology 010501 environmental sciences biology.organism_classification 01 natural sciences chemistry.chemical_compound chemistry Yield (chemistry) Paulownia elongata 0202 electrical engineering electronic engineering information engineering Trolox 0105 earth and related environmental sciences |
| Zdroj: | Biomass Conversion and Biorefinery. 12:3985-3993 |
| ISSN: | 2190-6823 2190-6815 |
| DOI: | 10.1007/s13399-020-01022-3 |
| Popis: | Paulownia wood demand is increasing, but other parts of the tree remain underused. The leaves have medicinal properties, and their processing with a clean technology was explored. Supercritical fluid extraction (SFE) was proposed for the production of extracts from Paulownia elongata x fortunei leaves. Three isotherms (35 °C, 45 °C, and 55 °C) were studied in the pressure range of 10–30 MPa to assess their influence on the extraction yield and antiradical properties. The use of ethanol as cosolvent was also evaluated. A global extraction yield of 4 g extract /100 g of leaves was obtained at 30 MPa and 45 °C using 10% ethanol (w/w) as modifier; the last fractions reached up to 0.30 g Trolox eq./g extract. Serial extractions with different concentrations of ethanol (60, 70, 80, and 96%) were performed. The global yield obtained with 70% ethanol in three stages was 32.9 g extract/100 g leaves, and the antiradical capacity of the first stage extract was equivalent to 0.4 g Trolox/g extract. Extraction kinetics was studied, and overall extraction curves were represented using Sovova’s model. |
| Databáze: | OpenAIRE |
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