Fresher Under Pressure Scientific Research

EXTRACTION

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High hydrostatic pressure extraction of flavonoids from propolis

Z. Shouqin; X. Jun; W. Changzheng1
Journal of Chemical Technology & Biotechnology January 2005, vol. 80, no. 1, pp. 50-54(5)

Abstract
A high hydrostatic pressure extraction (HHPE) method is presented for the extraction of flavonoids from propolis. Various experimental conditions of the HHPE process, such as solvents, ethanol concentration (35–95%, v/v), HHPE pressure (100–600 MPa), HHPE time (1–10 min) and solid/liquid ratio (1:5–1:45 g cm-3), were investigated to optimize the extraction process. The extraction yield with HHPE for 1 min was higher than those using extraction at room temperature for 7 days and heat reflux extraction for 4 h respectively. From the viewpoints of extraction time, the extraction efficiency and the extraction yield of flavonoids, HHPE was more effective than the conventional extraction methods studied./p>