【摘要】 本研究应用了加压液体萃取(pressurized liquid extraction, PLE)、微波辅助萃取(microwave assisted extraction, MAE)和超声辅助萃取(ultrasound assisted extraction, UAE)三种现代提取技术对车前叶蓝蓟籽油进行提取,并对乙酸乙酯、乙醇、水及其混合液作为溶剂的萃取条件进行了优化,以实现作为正己烷的替代绿色萃取溶剂。本研究表明,乙醇是一种作为车前叶蓝蓟籽油提取的非常有优势的绿色提取溶剂。PLE提取产量最高(32.1%),但温度也相对较高,可能导致部分不稳定化合物热降解。UAE (29.8%)的主要特点是在温和条件下进行的,低温(60℃)允许使用UAE作为热不稳定化合物的提取。另一方面,无论是开放系统(22.6%)还是封闭系统(24.9%),MAE都显示出所有测试技术的最低产油量。然而,MAE的优势主要是节省时间,并且可以每隔几分钟可重复进行一次快速有效的萃取。更多还原

【Abstract】 Three modern extraction technologies, namely pressurized fluid extraction(PLE), microwave-assisted extraction(MAE) and ultrasonic assisted extraction(UAE), were used in this study for seed oil extraction of Echium plantagineum L.. In order to realize the alternative green extraction solvent as n-hexane, the extraction conditions of ethyl acetate, ethanol, water, and their mixtures as solvents were optimized. The results showed that ethanol is a very advantageous green extraction solvent for the extraction of seed oil of Echium plantagineum. The highest yield of PLE extraction(32.1%), but the relatively high temperature, may lead to thermal degradation of some unstable compounds. The main feature of UAE(29.8%) was performed under mild conditions, and low temperature(60℃) allowed the use of UAE as the extraction of thermally unstable compounds. On the other hand,MAE showed the lowest production of all test technologies, whether it was open system(22.6%) or close system(24.9%). However, the main advantage of MAE would be time-saving and could be repeated once every few minutes for a quick and efficient extraction.更多还原