味连、雅连和云连产地不同,但化学成分基本相同。川黄柏和关黄柏也是这样。本文利用双波长薄层扫描法,对它们的鉴别条件进行了研究,选定硅胶 G 薄层,以三组展开系统、三组扫描波长鉴别三种黄连和两种黄柏。方法比较灵敏可靠,并可鉴别中成药制剂中该单味药的质量和真伪。 Odor, Yalian, and Yunlian have different origins, but the chemical composition is basically the same. The same is true of Chuan Huangbo and Guan Hubai. In this paper, two-wavelength thin-layer scanning method was used to study their identification conditions. A thin layer of silica gel G was selected. Three kinds of Coptis and two types of cork were identified using three sets of deployment systems and three sets of scanning wavelengths. The method is more sensitive and reliable, and can identify the quality and authenticity of the single herb in the Chinese patent medicine preparation.