METHODS Using the thin-layer chromatography to determine Radix Glycyrrhizae and Radix Platycodonis qualitatively,and applying the HPLC to testing the content of clycyrrhetinic acid.

• 方法:用薄层层析法对甘草、桔梗进行定性鉴别,应用高效液相色谱法对甘草次酸进行含量测定。