International Journal of Molecular Sciences | VOL. 11

β-Sitosterol: Supercritical Carbon Dioxide Extraction from Sea Buckthorn (Hippophae rhamnoides L.) Seeds

Publication Date Apr 22, 2010


Supercritical fluid extraction represents an efficient and environmentally friendly technique for isolation of phytosterols from different plant sources. Sea buckthorn (Hippophae rhamnoides L.) seeds were extracted with supercritical carbon dioxide at pressures ranging from 15-60 MPa and temperatures of 40-80 degrees C. Oil and β-sitosterol yields were measured in the extraction course and compared with Soxhlet extraction with hexane. The average yield of β-sitosterol was 0.31 mg/g of seeds. The maximum concentration of β-sitosterol in the extract, 0.5% w/w, was achieved at 15 MPa, 40 degrees C, and a carbon dioxide consumption of 50 g/g of seeds. The extraction rate was maximal at 60 MPa and 40 degrees C. Both β-sitosterol yield and its concentration in the extract obtained with hexane were lower than with carbon dioxide.


Sea Buckthorn Hippophae Rhamnoides Supercritical Carbon Dioxide Carbon Dioxide Sea Buckthorn Seeds Soxhlet Extraction Extraction Rate Plant Sources Buckthorn Seeds Oil Yields

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