AI Article Synopsis
- Waste hops are a rich source of flavonoids, which have potential health benefits.
- The study focused on extracting these flavonoids using supercritical fluid technology, testing varying temperatures, pressures, and ethanol concentrations.
- Optimal extraction was achieved at 50°C, 25 MPa, with a 50% solvent/material ratio and 80% ethanol concentration, yielding 7.8 mg of flavonoids per gram.
- Analysis identified xanthohumol as the primary flavonoid extracted from the hops.
Article Abstract
Waste hops are good sources of flavonoids. Extraction of flavonoids from waste hops (SC-CO(2) 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 degrees 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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1390442 | PMC |
| http://dx.doi.org/10.1631/jzus.2005.B0999 | DOI Listing |
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