Avances de la grafoquímica en el análisis de documentos dubitados para la determinación de falsificación de firmas con fines forenses

Abstract

Graphochemistry studies the properties, structures and transformations from the composition of a written document through an exhaustive analysis carried out by the chemical-forensic expert of the study of doubtful documents, through analysis physical-chemical and chemical-instrumental paper and inks that have been implemented in a manuscript either text or signature. The present research aims to establish the advances of graphochemistry through techniques applied in chemical-forensic expertise, for the clarification of forgery of signatures on dubious documents, with the help of deductive methods various techniques were determined for the analysis of paper and inks including the. Raman Spectroscopy, equipped with a laser that impacts the samples, generating a corresponding spectrum in low frequency modes that distinguish samples from others and IR Spectroscopy, where much of the molecules absorb light in the infrared region of the electromagnetic spectrum and convert it into vibrations molecular, characterizing the chemical properties present in the sample. Both techniques allow immediate, reliable results and above all do not alter or cause wear of the evidence.