Abstract: Black gel pen inks are mainly composed of solvent, pigment, thickening agent, stabilizer and other chemical additives. Chemical composition of inks manufactured by different factories or by the same factory but with different trademarks is often different, and this provides the basis for ink differentiation. In the study, based on uniform design and orthogonal design of mathematical statistics, the optimal conditions of thin layer chromatography for differentiation of black gel pen inks was tested. N,N-dimethyl formamide was selected as extractant, and tetrahydrofuran: methanol: 1,2-dichloroethane: chloroform=30:15:5:7 as developing solvent.

Key words: thin layer chromatography, gel pen ink, uniform design, orthogonal design

摘要： 黑色中性笔墨水主要由溶剂、色料、增稠剂、稳定剂和其他添加剂等组成,不同厂家或同厂家不同牌号中性笔墨水的成分不同,尤其是色料差别较大,这为中性笔墨水的种类鉴别提供了依据。本文利用数理统计中的均匀设计法和正交设计法安排试验,建立了一种可用于黑色中性笔色痕种类鉴别的方法:用N,N-二甲基甲酰胺作为黑色中性笔色痕的提取剂,四氢呋喃:甲醇:1,2-二氯乙烷:氯仿=30:15:5:7为展开剂的薄层色谱分析法。

关键词: 薄层色谱, 中性笔, 均匀设计, 正交设计