环境中的有害物质,特别是致癌物质,通常是极少量地混存于具有化学构造类似的多种化合物群中。因而,在分析这些有害物质时,所用的分析方法,不但选择性要好,而且必须具有高敏灵度。在分析环境中的有害物质时,一般是将所采样品中的有害物质抽出、分离、鉴定和定量。由于各种层析法的发展,在分离能力、分析时间、检出灵敏度和分析操作的简易性上,都有很大的进展。薄层层析法,自Stahl将制备薄层的 Harmful substances in the environment, especially carcinogens, are usually mixed in a very small amount in a number of chemical compounds with a similar compound group. Therefore, when analyzing these harmful substances, the analytical methods used are not only selective but also highly sensitive. In the analysis of harmful substances in the environment, the sample is usually taken out of harmful substances, separation, identification and quantification. Due to the development of various chromatography methods, great progress has been made in terms of separation ability, analysis time, sensitivity of detection and simplicity of analysis operation. Thin-layer chromatography, which will be prepared from Stahl