Mass spectrometry imaging method capable of rapidly identifying of handwriting authenticity

Abstract

The invention relates to a mass spectrometry imaging method capable of rapidly identifying of handwriting authenticity. According to the mass spectrometry imaging method, a surface desorption chemical ionization mass spectrometry is adopted in combination of a three-dimensional high-precision automatic control mobile system to carry out two-dimensional spectrum scan on the handwriting without pre-treating the sample, and mass spectrometry images of character compounds in the handwriting are obtained according to changes of ion signal intensities of the character compounds in the handwriting. The mass spectrometry imaging method can directly realize rapid identification of the handwriting authenticity of files at a molecular level under a normal temperature and a normal pressure without pre-treating the sample. The mass spectrometry imaging method has the advantages of simple operations, fast analysis speed, high precision, high sensitivity and no damage to the sample, overcomes the limits of low precision, low sensitivity and slow analysis speed in a conventional handwriting identification method and has enormous potential application prospects in the technical fields related to forensic analysis, archeology, finance, justice, etc.

Description

technical field [0001] The invention relates to the relevant technical fields of forensic analysis, archaeology, finance, justice and the like, in particular to a mass spectrometry imaging method for quickly identifying the authenticity of handwriting. Background technique [0002] Handwriting identification is a specialized technique for identifying writers based on their writing skills, habits, and characteristics, as reflected in their handwriting and paintings. and written language features to analyze the time situation and provide clues and evidence for litigation. Handwriting identification has always been an important part of forensic analysis, providing clues and evidence for litigation, and has been widely used in identity verification and the signing of important documents. The rapid development of modern science and technology and economic society has put forward higher requirements for handwriting identification methods and technologies, and it is urgent to deve...

AI Technical Summary

Problems solved by technology

However, both chromatography and chromatography-mass spectrometry require a complicated sample pretreatment process before sample analysis, which takes a long time (at least one hour), and some physical and chemical reactions often occur during sample processing, resulting in Some degree of damage to the sample

In addition, the sensitivity of spectroscopy is not high, which greatly limits the application of handwriting identification technology in related fields

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