Determination of bioactive constituents in Flos Sophorae Immaturus and Cortex Fraxini by capillary electrophoresis in combination with far infrared-assisted solvent extraction

► Infrared-assisted solvent extraction was coupled with capillary electrophoresis. ► Flos Sophorae Immaturus and Cortex Fraxini were extracted under infrared light. ► The extraction time was significantly reduced to 6 min. ► The proposed method has been applied to analyse real plant samples.