Dróżdż Paulina, Pyrzynska Krystyna
a Laboratory of Environmental Chemistry , Forest Research Institute , Sękocin Stary , Poland.
b Department of Chemistry , University of Warsaw , Warsaw , Poland.
Nat Prod Res. 2019 Jan;33(1):148-151. doi: 10.1080/14786419.2018.1437441. Epub 2018 Feb 16.
Room temperature ionic liquids are novel solvents with the specific properties that makes them of interest for application for extraction for a wide range of compounds. In this work extraction efficiency of flavonoids from heather flowers using ionic liquids based on imidazolium cation were evaluated and compared with organic solvents. It was found that the anion of ionic liquid significantly influence the extraction yields. Flavonoid content as well as antioxidant activity based on radical scavenging on 1,1-diphenul-2-pirylhydrazyl radicals and cupric reducing antioxidant capacity increased in the order: [Bmim]PF < [Bmim]BF < [Bmim]Cl. The obtained extraction yield using [Bmim]Cl were higher than reported for 60% ethanol and ethyl acetate under similar conditions, thus, may be helpful for better utilization of heather flowers as the potential pharmaceutical and nutraceutical ingredients.
室温离子液体是具有特殊性质的新型溶剂，这使得它们在多种化合物的萃取应用中备受关注。在这项工作中，评估了基于咪唑阳离子的离子液体从石南花中提取黄酮类化合物的效率，并与有机溶剂进行了比较。发现离子液体的阴离子对萃取产率有显著影响。基于对1,1-二苯基-2-吡啶基肼基自由基的清除能力和铜离子还原抗氧化能力的黄酮类化合物含量以及抗氧化活性按以下顺序增加：[Bmim]PF < [Bmim]BF < [Bmim]Cl。在类似条件下，使用[Bmim]Cl获得的萃取产率高于60%乙醇和乙酸乙酯的报道产率，因此，可能有助于更好地利用石南花作为潜在的药物和营养成分。
