Recovery of valuable lipophilic and polyphenolic fractions from cranberry pomace by consecutive supercritical CO2 and pressurized liquid extraction

In this study, cranberry pomace was consecutively fractionated by supercritical carbon dioxide (SC-CO2) and pressurized liquid (PLE) extraction for the recovery of lipophilic and polyphenolic fractions. Process parameters were optimized by response surface methodology (RSM), ethanol (EtOH) and water were used in PLE. The highest yield (11.10 ± 0.15%) in supercritical fluid extraction (SFE) was obtained at 42.4 MPa pressure, 53 °C temperature and 158 min. Linoleic (36.58%), linolenic (32.44%), oleic (21.79%) and palmitic (4.36%) acids were the major fatty acids in the oil. PLE-EtOH at optimal conditions (83 °C, 3 × 15 min) recovered 55.89% of soluble material while PLE-H2O (130 °C, 3 × 10 min) of the residue added 6.5% of extract. PLE-H2O extract was the strongest antioxidant, however PLE-EtOH recovered the major part of polyphenolics. PLE-EtOH effectively recovered anthocyanins and procyanidins. Peonidin-3-galactoside was the major anthocyanin, followed by peonidin-3-arabinoside. The results create a platform for’ zero waste’ processing of cranberry pomace at the industrial scale.Graphical abstract
Source: The Journal of Supercritical Fluids - Category: Chemistry Source Type: research