Recovery of oil components of okara by ethanol-modified supercritical carbon dioxide extraction [An article from: Bioresource Technology]

This digital document is a journal article from Bioresource Technology, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Recovery of the oil components of okara by ethanol-modified supercritical carbon dioxide extraction was investigated at 40-80^oC temperature and 12-30MPa pressure. In a typical run (holding period of 2h, continuous flow extraction of 5h), results indicated that the oil component could be best obtained with a recovery of 63.5% at relatively low temperature of 40^oC and mild pressure of 20MPa in the presence of 10mol% EtOH as entrainer. Based on gas chromatography-mass spectrometry (GC-MS) analysis, the extracts consisted mainly of fatty acids and phytosterols, and traces of decadienal. Folin-Ciocalteau estimates of total phenols showed that addition of EtOH as entrainer increased the yield and the amount of phenolic compounds in the extracts. The amounts of two primary soy isoflavones, genistein and daidzein, in the extracts also increased with increasing amount of EtOH.