签字笔墨水种类的仪器方法研究

发布时间：2019-01-10 16:51

【摘要】： 签字笔是人们日常生活中最常用的笔种,判别由签字笔墨水形成的合同,遗嘱,契约等法律文件的真伪是法庭鉴定中一个非常重要的课题,因此我们需要建立一种简便、快速、准确的鉴定方法,来判别签字笔墨水的类型、成分和形成字迹的真伪与异同。本文通过紫外可见分光光度法,薄层色谱法和高效液相色谱法对国内外生产的不同品牌的蓝色签字笔及红色签字笔墨水成分进行了系统的分类研究,通过用各种方法对墨水成分的分析和各类方法间的对比可以得到一个对签字笔笔墨水较准确的分类,为将来数据库的建立建立和对笔迹形成时间进一步的研究打下了坚实的基础。第一章绪论,介绍了近年来各种笔油墨的种类和研究字迹形成时间的各种仪器方法研究。第二章介绍了用紫外可见分光光度法和薄层色谱法对蓝色签字笔墨水的分类研究,根据紫外图峰位置和峰最大吸收波长的不同,利用该方法将46支蓝色签字笔墨水分为5类。并根据薄层色谱中斑点颜色不同和各色斑比移值的不同将蓝色签字笔墨水更加详细的分为9类。第三章介绍了用高效液相色谱法对蓝色签字笔墨水的分类研究,根据色谱峰的峰数,保留时间及该峰紫外最大吸收波长将其分为9类,能够与薄层色谱分类结果很好的对应。第四章用紫外可见分光光度法对35支红色签字笔进行分类研究,根据紫外图峰位置和峰最大吸收波长的不同利用该方法将其分为4类。第五章用高效液相色谱法对红色签字笔墨水进行了分类研究,根据色谱峰的峰数,保留时间及该峰紫外最大吸收波长将其分为11类,并且用外标法确认出其中一种常用染料为伊红。
[Abstract]:The signature pen is the most commonly used pen in people's daily life. Judging the authenticity of legal documents such as contracts, wills, contracts and other legal documents formed by the ink of the pen is a very important subject in court appraisal. Therefore, we need to establish a simple and fast method. The accurate identification method to distinguish the type, composition and the authenticity and difference of the signature pen ink. In this paper, the components of blue and red signature pens produced at home and abroad were systematically classified and studied by ultraviolet visible spectrophotometry, thin layer chromatography and high performance liquid chromatography. By analyzing the composition of ink with various methods and comparing various methods, we can get a more accurate classification of the pen, and ink. It lays a solid foundation for the establishment of database and the further study of handwriting formation time in the future. The first chapter introduces the types of pen and ink in recent years and the research of instruments and methods to study the time of writing formation. In the second chapter, the classification of blue pen ink by UV-Vis spectrophotometry and thin-layer chromatography is introduced. According to the difference of peak position and maximum absorption wavelength, 46 blue pen inks are classified into five categories by this method. The blue pen ink is classified into 9 types in detail according to the difference of spot color and color spot specific shift value in TLC. In chapter 3, the classification of blue ink by HPLC is introduced. According to the peak number of chromatographic peak, retention time and the maximum absorption wavelength of this peak, the ink can be classified into 9 categories, which can correspond well with the classification results of TLC. In chapter 4, 35 red signature pens are classified by ultraviolet visible spectrophotometry and classified into four categories according to the position of UV peak and the maximum absorption wavelength. In chapter 5, the red pen ink was classified by high performance liquid chromatography. The ink was classified into 11 categories according to the peak number, retention time and maximum absorption wavelength of the peak. One of the commonly used dyes was identified as eosin by external standard method.
【学位授予单位】：首都师范大学
【学位级别】：硕士
【学位授予年份】：2009
【分类号】：D918.92

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