ULTRASONIC EXTRACTION OF HEMPSEED OIL (pages 76–90)

摘要

In the present study, the use of ultrasonic conditions for the extraction ofnoil from hempseeds was investigated. The results show that ultrasonic extractionn(UE) requires a shorter operating time and results in less solvent consumptionnthan solvent extraction (SE). The optimal conditions for UE are asnfollows: power output: 200 W; exposure time: 25 min; acting on–off ratio:n20:20 (s/s); and solvent-to-solid ratio: 7:1 (v/w). The gas chromatography–nmass spectrometry analysis indicated that the composition of the hempseednoil that is extracted is not significantly (P u0002 0.05), if at all, affected by UE.nAdditionally, the 2,2-diphenyl-1-picryhydrazyl scavenging activity during thenUE is 13.5% higher than that obtained under SE in this test. Hempseed oil thatnis extracted by UE has a higher ultraviolet-absorbing capacity than the oilnobtained by SE. These tests indicate that UE may be a new, acceptable andneven potentially superior commercial oil extraction process for preservingnthe naturally occurring content of bioactive components that are found withinnthe oil.