University of Maribor, Faculty of Chemistry and Chemical Engineering, 2000 Maribor, Slovenia.
University of Ljubljana, Faculty of Chemistry and Chemical Technology, 1000 Ljubljana, Slovenia.
Molecules. 2020 Apr 1;25(7):1619. doi: 10.3390/molecules25071619.
For the isolation of selected phenolic compounds from dried chokeberries, natural deep eutectic solvents (NADESs) were investigated as a green alternative to conventionally used extraction solvents. Four types of NADESs were synthesised, with choline chloride as the hydrogen bond acceptor in combination with different hydrogen bond donors (sugars, organic acid and urea). Ultrasound-assisted extraction was used to improve the extractability of the phenolic compounds and the results were compared to those obtained with 80% methanol as the extraction media. The highest values of total phenols and total flavonoids were found in the extract obtained with choline chloride-fructose NADES (36.15 ± 3.39 mg gallic acid g dry weight (DW) and 4.71 ± 0.33 mg rutin g DW, respectively). The extraction recoveries for the individual phenolic compounds depended strongly on the phenolic compound's structure, with relative mean values between 70% and 97%.
为了从干越桔中分离出选定的酚类化合物，研究了天然深共熔溶剂（NADES），作为传统使用的提取溶剂的绿色替代品。合成了四种类型的 NADES，以氯化胆碱作为氢键受体，与不同的氢键供体（糖、有机酸和尿素）结合。采用超声辅助提取来提高酚类化合物的提取率，并将结果与以 80%甲醇作为提取介质的结果进行比较。在使用氯化胆碱-果糖 NADES 的提取物中发现了最高的总酚和总类黄酮含量（分别为 36.15±3.39mg 没食子酸 g 干重 (DW) 和 4.71±0.33mg 芦丁 g DW）。个别酚类化合物的提取回收率强烈依赖于酚类化合物的结构，相对平均值在 70%至 97%之间。
