超临界CO_2技术分离提纯青蒿挥发油及成分分析

Extraction and Purification of Southernwood Oil with SFE-MD and Its Component Analysis

用超临界CO2流体萃取技术（SFE）制得青蒿油浸膏，然后用分子蒸馏技术（MD）进行精制。超临界CO2流体萃取青蒿精油最佳工艺条件为：萃取压力25MPa，温度50℃，CO2流量25kg／h，萃取时间3h；分子蒸馏温度为80～120℃，所得青蒿油呈淡黄色，得率由传统水蒸气蒸馏法的0．13％提高到0．47％；所得精油经GC-MS分析，检测出60种成分，主体呈香成分为柠檬烯、（1S）-α-蒎烯、β-蒎烯、β-金合欢烯、α-石竹烯、γ-榄香烯等烯类，精油质量标准达到FCC（2006）。

The southemwood oil cream was prepared with the supercritical CO2 fluid extraction technology （SFE）, and then purified with the molecular distillation technology. The best process conditions were ： extraction pressure 25 MPa, extraction temperature 50 ℃ , CO2 flux 25 kg/h, extraction time 3 h, and the molecular distillation temperature 80 - 120 ℃. The southemwood oil obtained was faint yellow, the quality degree of which achieved FCC （2006） , and the yield enhanced from 0. 13% of the traditional steam distillation technology to 0. 47%. The obtained volatile oil was analyzed by GC - MS, and proved to contain 60 kinds of ingredients, of which the main fragrant ingredients were limonene, （ 1 S） -α-pinene,β-caryophyllene ,β-famesene ,β-pinene and γ-elemene.