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。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;二是薄层的厚度不能随意地准确调节。为了弥补这两个缺点,我们设计了一种铺层器,如图1所示。它既适用于湿法铺层,也适用于干法铺层,而且薄层厚度可以随意地准确调节。经过二年多的试用,比较满意。今介绍如下。一、制作方法 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. 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, wet lay-up is not applicable; the other is the thickness of the thin-walled can not be accurately adjusted. To compensate for these two drawbacks, we designed a ply layup, as shown in Figure 1. It is suitable for wet lay-up, but also for dry lay-up, and the thickness of the layer can be accurately adjusted. After more than two years of trial, more satisfied. Now introduce as follows. First, the production method