新生化口服液由益母草、桃仁、当归、枳壳等12味药材组成,益母草为该制剂中的君药,且在处方中用量最大(占药材总量的23.8％)。水苏碱是益母草的主要有效成分,本文采用双波长薄层扫描法对水苏碱进行定量分析,以此作为该制剂的质量控制指标之一。1 仪器与试药 双波长薄层扫描仪(日本岛津CS-930); Xinshenghua oral liquid consists of 12 herbs, including Motherwort, peach kernel, Chinese angelica root, and Citrus aurantium. Motherwort is the king drug in this preparation and has the largest amount in the prescription (accounting for 23.8% of the total amount of medicinal materials). Stachydrine is the main active ingredient of Motherwort. In this paper, the quantitative analysis of stachydrine was performed using the dual-wavelength thin-layer scanning method as one of the quality control indicators of the preparation. 1 Instruments and reagents Dual-wavelength thin-layer scanner (Shimadzu CS-930, Japan);