Department of Chemical Engineering, Inha University, Incheon 402-751, Korea.
J Sci Food Agric. 2011 Dec;91(15):2888-92. doi: 10.1002/jsfa.4553. Epub 2011 Jul 11.
Ionic liquids are a class of organic salts with melting points equal to or below 100 °C, and their use in sample preparation has shown its promise, for example, in alleviation of environmental pollution and improvement of selectivity and extraction of certain interesting compounds.
Optimal conditions were obtained by using 1.0 mol L(-1) 1-butyl-3-methylimidazolium methylsulfate ([Bmim][MS]) aqueous solution at pH 1.0 as the extraction solvent. An ultrasonic power of 200 W was chosen to ensure complete dispersion of [Bmim][MS] into celery in 90 min and the solid:liquid ratio was 1:10.
The proposed ultrasonic assistant extraction approach, based on ionic liquid aqueous solution, exhibited satisfactory results, with recovery values ranging from 72.7% to 89.5%. Under optimal conditions, compared with conventional solvent extraction amounts of luteolin and apigenin were more than doubled.
离子液体是一类熔点等于或低于 100°C 的有机盐，它们在样品制备中的应用已经显示出了其潜力，例如缓解环境污染以及提高某些感兴趣化合物的选择性和提取率。
通过使用 1.0 mol L(-1) 1-丁基-3-甲基咪唑硫酸甲酯盐([Bmim][MS])水溶液作为萃取溶剂，在 pH 值为 1.0 时得到了最佳条件。选择 200 W 的超声功率以确保在 90 分钟内将 [Bmim][MS]完全分散到芹菜中，固液比为 1:10。
基于离子液体水溶液的超声辅助萃取方法，结果令人满意，回收率在 72.7%至 89.5%之间。在最佳条件下，与传统溶剂萃取相比，木犀草素和芹菜素的提取量增加了一倍以上。
