一、前言近年来,在物证分析中有许多方法用于检验圆珠笔油,尤其是利用薄层色谱及薄层扫描法。本文是在“利用模糊正交法选择圆珠笔油薄层色谱展开剂”的研究基础上,选择了适用于圆球笔油墨相对书写时间鉴定的较理想的薄层色谱条件。即以硅胶CMC 为吸附剂,以异丙醇单一溶剂为展开剂,进行二次展开。其检测结果再现性好,斑点清晰、规整,分离效果好,适于薄层扫描,有利于各组分相对含量的 I. Introduction In recent years, there are many ways to test ball point pen oil in physical evidence analysis, especially using thin-layer chromatography and thin-layer scanning. Based on the research of selecting the ballpoint pen oil thin layer developing solvent by fuzzy orthogonal method, the paper chooses the ideal thin layer chromatography condition which is suitable for the relative writing time of ball pen ink. That is, silica gel CMC as adsorbent, isopropyl alcohol as a solvent for a single solvent, the second expansion. The test results reproducibility, spot clear, regular, good separation, suitable for thin-layer scanning, is conducive to the relative content of each component