建立了一种绿色、快速、高效萃取和富集中药急性子中4种凤仙萜四醇皂苷的方法。采用离子液体并结合超声辅助萃取急性子中的化学成分,利用固相萃取小柱富集提取液中的凤仙萜四醇皂苷。通过考察离子液体种类及用量、p H值、超声时间、固相萃取剂和洗脱剂等实验条件对提取率的影响,确立了最优萃取剂为[C6mim]Br,最优萃取条件:萃取剂用量为0.9 m L,提取液p H=7.0,超声为30 min,最优富集条件:固相萃取小柱填料为0.9 g CHP20/P120,上样流速为1.5 m L/min,洗脱剂为1.5 m L甲醇。在最优条件下,4种凤仙萜四醇苷加标回收率在92.1%~108.2%之间,相关系数范围为0.9945~0.9975,检出限范围为1.8~4.5μg/m L,RSD<3.9%。本方法与传统回流提取方法提取效果接近,可准确测定急性子中4种凤仙萜四醇苷含量。
A method for determination of quercetin in 8 kinds of Chinese herbal medicines by capillary electrophoresis(CE) with microwave assisted extraction(MAE) was developed. These medicines include Hypericum periforatum, Semen cuscuta, Flos sophorae buds, Flos sophorae flowers, Herba euphorbiae humifusae, Acanthopanax, Ginkgo biloba L. leaves and Rhododendron dauricuml. The method is simple, rapid and with satisfactory recoveries and good reproducibilities.
