基于红外光谱无损区分可擦中性笔墨水色痕的研究

可擦中性笔墨水色痕形成文件的检验是目前法庭经常遇到的问题,建立一种简便、灵敏、快速、定性准确的区分可擦中性笔墨水色痕种类的方法是当前公安实战部门所需要的。研究中利用红外显微镜,采用单点模直接采集可擦中性笔墨水色痕的红外光谱。实验结果表明,根据样品红外吸收光表征的红外吸收峰的位置、数目、强度及形状可将不同品牌的可擦中性笔墨水色痕区分开来。

A Study on Nondestructive Determination of Erasable Gel Pen Ink Stains Based on FTIR

The court is always confronted with such difficulties as to examine the document with ink stains of erasable gel pen. Therefore, it is necessary to establish a simple, sensitive, rapid and accurately identifying method for the public security organs to distinguish different ink stains of erasable gel pen. The research applies infrared microscope and single point mode to directly collect infrared spectrum of the ink stains of erasable gel pen. The results show that the erasable gel pen ink stains of different brands can be distinguished according to the location, number, intensity and shape of the infrared absorption peak of the sample＇s infrared absorption spectrum characteristics.