화학공학소재연구정보센터
Journal of Supercritical Fluids, Vol.94, 245-251, 2014
Extraction of bioactive enriched fractions from Eruca sativa leaves by supercritical CO2 technology using different co-solvents
Supercritical fluid extraction from freeze-dried Eruca saliva leaves is assessed with the aim of studying the feasibility to obtain bioactive enriched fractions containing different classes of valuable compounds. Total extraction yields and compositions using pure CO2 and CO2 + selected co-solvents are compared. Overall extraction curves, fitted by the model of broken and intact cells developed by Sovova, are reported and the influence of the main parameters that affect the extraction process is analysed. The extract with the highest content in glucosinolates and phenols was collected at 30 MPa and 75 degrees C using 8% (w/w) of water with respect to the CO2 flow rate, whereas the fraction richest in lipids was obtained using 8% (w/w) of ethanol as co-solvent at 45 degrees C and 30 MPa. A process including a first step with supercritical CO2 extraction using water as co-solvent followed by a second step, where a fraction rich in lipids is extracted using ethanol as co-solvent, is proposed. SCCO2 results are compared with Soxhlet and other methods that combine organic solvents with ultrasounds. (C) 2014 Elsevier B.V. All rights reserved.