摘  要随着我国中性笔产业的快速发展，中性笔被越来越多的应用于我们生产生活当中。不法分子通过中性笔伪造、变造凭证的案件也渐渐开始层出不穷。中性笔种类繁多，在许多刑事案件和经济纠纷等案件中，有效判别中性笔墨迹成分对于案件侦破十分重要。78489

为探索出一种灵敏度强、准确性高且操作简便的中性笔墨迹成分检验研究方法。本论文系统的论述了多种中性笔墨迹成分的检验研究方法，并对各种研究方法进行了综合性分析。通过分析发现气相色谱—质谱联用法检验中性笔墨迹具有操作简便、灵敏度高和检测速度快的特点。本论文以甲醇为提取溶剂，对市售20种不同中性笔墨迹成分进行了气相色谱—质谱联用法检验。通过图谱分析发现，气相色谱—质谱联用法可以有效区分不同中性笔墨迹，为公安司法鉴定工作提供了一定的技术支撑。

毕业论文关键词：中性笔墨迹；气相色谱—质谱联用法；区分

ABSTRACT With the rapid development of China's gel pen industry, gel pens are increasingly used in our production and life。 Cases of criminals forging and altering vouchers through gel pens have gradually begun to emerge。 There are many types of gel pens。 In many criminal cases and economic disputes, it is very important to effectively determine the ink composition of gel pens for the detection of the case。

In order to explore a research method of neutral pen ink composition inspection with strong sensitivity, high accuracy and easy operation。 This thesis systematically discusses a variety of neutral pen ink composition research methods, and comprehensively analyzes various research methods。 Through analysis, it is found that the gas chromatography-mass spectrometry method for inspecting gel ink has the characteristics of simple operation, high sensitivity and fast detection speed。 In this paper, methanol was used as the extraction solvent, and gas chromatography-mass spectrometry was used to test the composition of 20 different neutral pen inks on the market。 Through atlas analysis, it was found that gas chromatography-mass spectrometry can effectively distinguish different neutral pen inks, providing a certain technical support for the public security judicial identification work。

Key words:Gel ink；Gas chromatography-mass spectrometry；distinguish

目  录

引言 1

一、研究背景 2

（一）中性笔墨迹的检验方法 2

1。直接观察法 2

2。光谱法 2

3。色谱法 3

4。毛细管电泳法 5

6。气相色谱—质谱联用法 5

7。各种方法的比较 6

（二）检测中性笔墨迹成分的意义 7

二、 实验 7

（一）实验仪器、试剂和样品 7

1。实验仪器 7

2。实验试剂 8

3。实验样品 8

（二）实验步骤 8

1。实验条件 8

2。实验操作步骤 9

（三）讨论 9

1。中性笔墨迹成分的GC-MS分析 9

2。依据中性笔墨迹成分进行区分