薄层析已经成为一种重要的化学分析方法,近十年来发展很快,在药物分析、鉴定和中草药研究工作中,已经广泛采用。但是到目前为止,铺层用的工具国内还没有出售,分析和研究人员不得不自行制作。国内书刊上介绍的自制铺层器都是玻棒式,它们结构简单,容易自制,是其优点。但都有两个共同的缺点:一是只适用于干法铺层,不适用于湿法铺层; Thin-layer chromatography has become an important chemical analysis method, which has developed rapidly in recent ten years. It has been widely used in drug analysis, identification and Chinese herbal medicine research. But so far, tools for laying have not been sold domestically, and analysts and researchers have to make their own. Homemade ladle devices introduced in domestic publications are all glass rod type. They have the advantages of simple structure and easy self-made. But there are two common shortcomings: one is only applicable to dry lay-up, not suitable for wet lay-up;