低共熔溶剂提取淫羊藿黄酮类成分及回收工艺研究

Study on extraction and recovery technology of flavonoids from Epimedii folium in deep eutectic solvents

目的探究低共熔溶剂法提取淫羊藿中黄酮类化合物的最佳提取工艺。方法以淫羊藿中朝藿定A、朝藿定B、朝藿定C、淫羊藿苷的总提取率作为评价指标,在料液比、摩尔比、含水率、提取温度、提取时间等单因素试验的基础上结合正交试验设计对淫∶羊藿中黄酮类成分∶的提取工艺进行优化,并利用大孔树脂对溶剂中的成分进行回收。结果氯化胆碱与乙醇胺形成的低共熔溶剂提取效果最好,当氯化胆碱与乙醇胺的摩尔比为1总提取率为(20.07±0.43)mg/g,且AB-8大孔树脂能够回收低共熔溶剂中的黄酮类成分,平均回收率为88.29%。结论低共熔溶剂较传统提取溶剂提取效率高,回收工艺简单,回收率高,在中药活性成分提取应用中有巨大的潜力。

Objective To explore the optimal extraction process of flavonoids from Epimedii folium by deep eutectic solvent method.Methods Using the extraction rate of epimedin A,epimedin B,epimedin C and icariin in Epimedii folium as evaluation indices,the extraction process of flavonoids in Epimedii folium was optimized based on single factor experiments such as solid-liquid ratio,molar ratio,moisture content,extraction temperature,and extraction time,combined with orthogonal experimental design,and the components in the solvent were recovered using macroporous resin.Results The deep eutectic solvent formed by choline chloride and ethanolamine had the best extraction effect.When the molar ratio of choline chloride to ethanolamine was 1∶4,the solid-liquid ratio was 0.5 g∶25 mL,the water content was 50%,the extraction temperature was 70℃,and the extraction time was 15 minutes,the total extraction rate was(20.07±0.43)mg/g,and the AB-8 macroporous resin could recover flavonoids in the eutectic solvent with an average recovery rate of 88.29%.Conclusion Deep eutectic solvents have great potential in the extraction of active ingredients in traditional Chinese medicine due to their simple preparation and higher extraction efficiency compared to traditional solvents.