Objective:Establish a RP-HPLC method to detect the plasma concentration of ammonium glycyrrhizinate in rat after oral administration of glycyrrhizin powder and Si-jun-zi decoction(SJZD).

• 目的:建立反相高效液相色谱法测定甘草甜素粉剂和四君子汤灌胃大鼠血浆中的甘草酸铵。