益母草LeonurusheterophyllusSweet常用作活血化瘀药物，主要含益母草碱和水苏碱。应用大孔树脂柱处理或溶剂净化提取技术，处理所得样品液点于硅胶G薄层板上，以正丁醇-盐酸-乙酸乙酯（4：1．5：0．5）为展开剂，用碘化铋钾试剂显色，直接用双波长薄层扫描法测定水苏碱含量， Motherwort LeonurusheterophyllusSweet is commonly used as a drug for activating blood circulation, mainly containing Leonuridine and Stachydrine. Using macroporous resin column or solvent purification extraction technology, the resulting sample solution was applied to a thin layer of silica gel G, using n-butanol-HCl-ethyl acetate (4:1.5:0.5) as a developing agent. The color was developed with cesium-potassium iodide reagent and the content of stachydrine was determined directly by double-wavelength thin-layer scanning.