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根据共聚焦拉曼光谱法,确定由激光打印机调色剂和密封墨水形成的交界线的顺序
Shuo Liu1,2, Yaqi Yang1,3, Yi Zhang4
1Institute of Evidence Law and Forensic Science, China University of Political Science and Law, Beijing, China.
Journal of forensic sciences
|September 24, 2024
概括
同焦拉曼光谱有效地确定了相交的激光打印机墨水和密封墨水线的序列. 这种非破坏性的方法为质疑的文件审查挑战提供了一个新的解决方案.
科学领域:
- 法医科学 法医科学 法医科学
- 分析化学 分析化学
背景情况:
- 在被质疑的文件中确定交叉线的顺序是一个持续的挑战.
- 目前分析激光打印和密封油墨交叉点的现有方法是有限的.
研究的目的:
- 经验验证共聚焦拉曼光谱法,以确定激光打印机色剂和密封油墨线交叉的序列.
- 评估共聚焦拉曼光谱法在各种色调类型和密封油墨中的有效性.
主要方法:
- 从66个中国市场模型中收集了110种密封油墨和1074个激光打印测试页.
- 选择了13种密封油墨和3种激光打印机类型,用于78个代表性的交叉样本.
- 在点扫描模式下利用共聚焦拉曼光谱进行分析.
主要成果:
- 连焦拉曼光谱学成功而非破坏性地确定了激光打印和密封墨线交叉的序列.
- 调色剂密度影响了检查难度;调色剂密度较高的印刷品是最容易的,多孔/分散的调色剂印刷品是最具挑战性的.
- 这种方法对于分析这些特定的交叉点类型来说是快速而准确的.
结论:
- 孔焦拉曼光谱是一种可行的工具,用于对激光打印和密封油墨交叉点的非破坏性分析.
- 该研究为分析其他印刷和写字仪器的交叉点提供了基础.
- 进一步的研究可以通过替代分析技术来证实这些发现.
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