Optimization of conditions for supercritical fluid extraction of flavonoids from hops (Humulus lupulus L.) |
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| Authors: | He Guo-qing Xiong Hao-ping Chen Qi-he Ruan Hui Wang Zhao-yue Traoré Lonseny |
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| Institution: | (1) Department of Food Science and Nutrition, Zhejiang University, 310029 Hangzhou, China;(2) Department of Food Science and Nutrition, University of Conakry, PB 1147, Guinea |
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| Abstract: | Waste hops are good sources of flavonoids. Extraction of flavonoids from waste hops (SC-CO2 extracted hops) using supercritical fluids technology was investigated. Various temperatures, pressures and concentrations
of ethanol (modifier) and the ratio (w/w) of solvent to material were tested in this study. The results of single factor and orthogonal experiments showed that at
50°C, 25 MPa, the ratio of solvent to material (50%), ethanol concentration (80%) resulted in maximum extraction yield flavonoids
(7.8 mg/g). HPLC-MS analysis of the extracts indicated that flavonoids obtained were xanthohumol, the principal prenylflavonoid
in hops.
Project (No. Y304203) supported by the Natural Science Foundation of Zhejiang Province, China |
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| Keywords: | Optimization Supercritical fluid extraction Flavonoids Xanthohumol Hops (Humulus lupulus L ) |
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