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作 者 ：杜新旋;祖元刚*;赵修华;祖述冲

期 刊 ：植物研究 2011年 31卷 5期 页码：618-622

关键词：南瓜子油；超声提取；GC-MS；酸价；

Keywords:Cucurbita moschata Kernels oil, ultrasonic extraction, GC-MS, acid value,

摘 要 ：应用超声提取与传统热溶剂回流法提取南瓜子油，通过正交实验法考察了料液比、提取时间和超声功率3个因素对提取率的影响，得到了最佳超声提取工艺条件：料液比为1∶15(w/v)，提取时间为0.5 h，超声功率为250 W，优化条件下提取率为50.8%，对照热溶剂回流提取法的提取率49.9%（6.0 h）；南瓜子油的GC-MS分析结果显示两种方法对南瓜子油成分无明显影响；超声提取的南瓜子油酸价（1.51 mg·g^-1）低于热溶剂回流提取法（3.25 mg·g^-1）。上述结果表明超声提取南瓜子油与热溶剂提取法比较具有操作简便、省时和低酸价的优点。

Abstract:Ultrasonic extraction and traditional reflux extraction of oil from Cucurbita moschata kernels were studied with orthogonal method. The influencing factors, including ratio of material to solvent, extraction time and ultrasonic power were researched in the experiment. The optimal conditions were obtained as follows: ratio of material to solvent 1∶15(w/v), extraction time 0.5 h and ultrasonic power 250 W, the yields of reflux extraction and optimum ultrasonic extraction were 49.9% and 50.8%, respectively. The oil composition was analyzed by GC-MS. The results indicated no obvious difference between two extracts, and the oil extracted by ultrasonic extraction had the lower acid value (1.51 mg·g^-1) compared to reflux method (3.25 mg·g^-1). The above results show that ultrasonic extraction is more convenient and time-saving, and the oil extracted by this method has the lower acid value.

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