Aplicação forense da libs em amostras de vidro: uma revisão

Abstract

Glass fragments are frequently found at crime scenes, serving as crucial microtraces in forensic investigations. The analysis of glass aims to identify the origin of these fragments and differentiate them, contributing to the reconstruction of events and the determination of material facts. Due to the diversity of glass types, chemical components, and manufacturing processes, these analyses involve both physical and optical properties as well as chemical composition. Although refractive index measurements were widely used in the past, technological advancements have necessitated more precise techniques, such as elemental analyses, to determine the origin of glass. In this context, the development of fast, simple, and accurate methods has become essential. The LIBS technique (Laser-induced breakdown spectroscopy) emerges as a promising solution. With the ability to detect multiple elements and minimal sample preparation required, LIBS allows for the identification of the unique spectral fingerprint of each sample. Its straightforward operation, low cost, and nondestructive nature make it a viable technique for forensic applications, enabling the accurate classification and differentiation of glass fragments.