State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, P. R. China.
J Sep Sci. 2013 Dec;36(23):3799-806. doi: 10.1002/jssc.201300906. Epub 2013 Oct 31.
A rapid, green and effective miniaturized sample preparation technique, ionic-liquid-assisted microwave distillation coupled with headspace single-drop microextraction was developed for the extraction of essential oil from dried Dryopteris fragrans. 1-Ethyl-3-methylimidazolium acetate was the optimal ionic liquid as the destruction agent of plant cell walls and microwave absorption was medium. n-Heptadecane (2.0 μL) was adopted as the suspended microdrop solvent in the headspace for the extraction and concentration of essential oil. The optimal parameters of the proposed method were an irradiation power of 300 W, sample mass of 0.9 g, mass ratio of ionic liquids to sample of 2.8, extraction temperature of 79°C, and extraction time of 3.6 min. In comparison to the previous reports, the proposed technique could equally monitor all the essential oil components with no significant differences in a simple way, which was more rapid and required a much lower amount of sample.
一种快速、绿色、有效的微型化样品制备技术，离子液体辅助微波蒸馏结合顶空单滴微萃取，用于从干燥的贯众中提取精油。1-乙基-3-甲基咪唑醋酸盐是作为植物细胞壁的破坏剂和微波吸收剂的最佳离子液体。正十七烷（2.0 μL）被采用作为顶空萃取和浓缩精油的悬浮微滴溶剂。所提出的方法的最佳参数为辐照功率 300 W，样品质量 0.9 g，离子液体与样品的质量比为 2.8，萃取温度为 79°C，萃取时间为 3.6 分钟。与之前的报告相比，该技术以简单的方式同样可以监测所有的精油成分，没有明显差异，并且更快，所需的样品量更少。
