苏州荠芋挥发油的提取工艺研究

目的：考察苏州荠芋挥发油的不同提取方法，以确定最佳提取工艺。方法：采用超临界CO2萃取、水蒸气蒸馏和有机溶剂萃取三种方法提取苏州荠芋挥发油，以所得得油率和所得挥发油的化学成分为指标，对三种方法进行比较。结果：经GC—MS分析结果表明，超临界CO2萃取的得油率为3．46％，要高于其它提取方法。采取超临界CO2萃取和水蒸气蒸馏的苏州荠芋挥发油品质较优。三种方法提取的苏州荠芋挥发油的主要成分基本相似。主要为甲基丁香酚（methyleugenol），占42％左右；其次是单萜类化合物龙脑稀（bomene）、侧伯酮（thujone）、二氢香芹酮（dihydrocarvon）、香荆芥酚（carvacrol）等，占27％左右；再次是倍半萜类化合物橙花烯（nerolidene）和γ-杜松烯等约占19％左右。结论：超临界CO2萃取法为提取苏州荠芋挥发油的理想方法。

Study on Extraction Methods of Volatile Oil from Mosla soochowensis

Objective:To study the different extraction methods of the volatile oil from Mosla soochowensis Matsuda and to deter-mine the optimum extraction method. Methods: The yields and the chemical constituents of volatile oil were used to compare the differ-ent extraction methods including SFE-CO_2, steam distillation and organic solvent(petroleum ether) extraction. Results:The yield of volatile oil by means of SFE-CO_2 was 3. 46% , which was higher than others. The quality of the oil by means of SFE-CO_2 and steam distillation was better. Based on the result of GC-MS, the constituents of volatile oil were similar. It was mainly the methyleugenol, ac-counted for about 42%. The second was monocyclic terpene, such as bornene, dihydrocarvon, carvacrol, accounted for about 27%. The third was sesqutierpenoids, such as nerolidene etc, accounted for about 19%. Conclusion:SFE-CO_2 is the optimum extraction method of the volatile oil from Mosla soochowensis Matsuda.