Supercritical carbon dioxide extraction of sea buckthorn (Hippophae rhamnoides L.) pomace |
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Authors: | Dániel Cossuta Béla Simándi Judit Hohmann Fruzsina Doleschall Tibor Keve |
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Affiliation: | 1. Department of Chemical Engineering, Budapest University of Technology and Economics, Müegyetem rakpart 3, H‐1521 Budapest, HungaryDepartment of Chemical Engineering, Budapest University of Technology and Economics, Müegyetem rakpart 3, H‐1521 Budapest, Hungary;2. Department of Chemical Engineering, Budapest University of Technology and Economics, Müegyetem rakpart 3, H‐1521 Budapest, Hungary;3. Department of Pharmacognosy, University of Szeged, E?tv?s utca 6, H‐6720 Szeged, Hungary;4. Research Center, Bunge Co., Kvassay Jen? út 1, H‐1095 Budapest, Hungary;5. Gradiens Ltd, Gizella út 42‐44, H‐1143 Budapest, Hungary |
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Abstract: | BACKGROUND: The goal of this work was to utilize the sea buckthorn pomace, which is the by‐product of a sea buckthorn juice process. Pilot plant supercritical fluid extraction (SFE) experiments were performed in a 5 × 10?3 m3 volume high‐pressure vessel. The effects of pressure and temperature on extraction yield and recoveries of biologically active components were studied using a 32 full factorial design. The pressure and temperature were varied over the ranges of 30–46 MPa and 313–353 K, respectively. The extract samples were analysed by TLC‐densitometry, UV/VIS spectrofotometry and HPLC methods. RESULTS: The obtained yields changed between 142–164 g kg?1, according to the solvent power of the supercritical fluid. The recoveries of the different minor components were (g minor components kg?1 dried raw material): 2.50–4.25 sitosterol, 0.20–1.60 ursolic acid, 0.04–0.18 carotenoid, 0.35–0.42 total tocopherol. CONCLUSION: By evaluation the designed experiments 46 MPa and 333 K were chosen as the optimum conditions. Copyright © 2007 Society of Chemical Industry |
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Keywords: | sea buckthorn Hippophae rhamnoides supercritical fluid extraction carotenoids sitosterol ursolic acid tocopherols |
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