摘要热敏纸是一种用于热敏打印机和热敏传真机的信息记录纸，具有打印速度快、打印清晰、成本低的优点，多应用于超市购物小票、传真、高速收费站、交易收据等处。因为其使用范围广，因此在公安工作中会遇到需要从票据中获取线索或对热敏纸小票进行区分的案件。目前已经涌现出了多种对热敏纸检验的方法，实际表明对热敏纸异同的检验在疑难案件中有明显的作用，犯罪行为存在于任何地市，也可能横跨地市，在不同地区之间进行热敏纸的检验同样很有必要。78486

由于热敏纸成分复杂、难溶、难粉碎，一般化学法难以快速、无损的检测热敏纸。傅里叶变换红外光谱仪作为第三代光谱仪器，其自身强大的性能可以极大简化鉴别过程。本文利用傅里叶变换红外光谱法的ATR技术对收集到的不同地区30种热敏纸小票进行快速无损检验，并根据红外光谱图的异同进行了有效区分。该方法可以为热敏纸相关检验鉴别工作提供参考与依据。

毕业论文关键词：傅里叶变换红外光谱法；热敏纸；鉴别

ABSTRACT Thermal paper is a kind of information recording paper used in thermal printer and thermal fax machine。 It has the advantages of fast printing speed, clear printing and low cost。 Because of its wide range of use, there will be cases in the public security work that need to get clues from the bills or distinguish the small thermal paper bills。 At present, a variety of methods have emerged to test the thermosensitive paper。 The fact shows that the test of the similarities and differences of the thermosensitive paper plays an obvious role in difficult cases。 The crime exists in any city or across the city。 It is also necessary to test the thermosensitive paper in different regions。           

Due to the complex formation process, many components, and difficult to dissolve and crush, it is difficult for ordinary transmission method or chemical method to detect thermal paper documents quickly and non destructively。 As the third generation of spectral instruments, Fourier transform infrared spectrometer can greatly simplify the identification process。 In this paper, Fourier transform infrared spectroscopy (FTIR) and ATR technology are used to quickly and non destructively inspect 30 kinds of thermal paper tickets collected in different areas, and effectively distinguish them according to the differences and similarities of infrared spectrograms。 This method can provide reference and basis for the inspection and identification of thermal paper documents。 

Keywords: fourier transform infrared spectroscopy; thermal paper; identification

目 录

引 言 1

一、研究背景 1

（一）热敏纸的检验方法 1

1。拉曼光谱法 1

2。傅里叶显微红外光谱法 2

3。扫描电镜/能谱法 2

4。傅里叶变换红外光谱法 3

（二）热敏纸检验的意义 3

二、实验部分 3

（一）实验仪器与样品 4

1。实验仪器 4

2。实验样品 4

（二）实验步骤 5

（三）结果与讨论 5

1。样品不同部位影响 5

2。同一地区、不同年限热敏纸