Extraction of oil from tiger nut (Cyperus esculentus L.) with supercritical carbon dioxide (SC-CO₂)

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• 作者：Ola Lasekan^a ; ^{lasekan@food.upm.edu.my} ; ^{lasekan61156@yahoo.com} ; Sabo M. Abdulkarim^b
• 关键词：Tiger nut oil ; Supercritical CO2 extraction ; Response surface methodology ; Fatty acid composition ; Viscosity
• 刊名：Lebensmittel-Wissenschaft und -Technologie
• 出版年：2012
• 期刊代码：121_00236438
• 类别：abs
• 出版时间：July, 2012
• 卷：47
• 期：2
• 页码：287-292
• 文件大小：480 K

摘要

Supercritical carbon dioxide (SC-CO₂) was used to extract oil from tiger nuts and the physicochemical properties and the impact of extraction conditions [i.e., temperature (40聽掳C-80聽掳C), pressure (20-40聽MPa) and time (60-360聽min)] on the oil yield were studied. The response surface analysis results revealed that the oil yield was significantly (P聽<聽0.05) influenced by the main effect of the extraction pressure, extraction time and their quadratic effects respectively. However, the interaction between the extraction temperature and time had no significant (P聽>聽0.05) effect on the oil yield. The highest oil yield was 26.28聽g/100聽g sample after 210聽min of extraction time at 30.25聽MPa and 60聽掳C respectively. The fatty acid composition of oils obtained by SC-CO₂ and Soxhlet showed marked variation. Also, the fatty acid composition varied depending on the operating conditions. The viscosity of the oil decreased with the increase in temperature.