Method:Glycyrrhiza uralensis, Platycodon grandiflorum and Echinaceae purpurea were identified by TLC, and the content of Glycyrrhizic acid and Cichoric acid were determined by HPLC.

• 方法:用薄层色谱法鉴别甘草、桔梗、紫花松果菊,用高效液相色谱法测定甘草酸和菊苣酸的含量。