Abstract.A comparative study between three automotive headlights (conventional, halogen, and HID lamp) using scanning electron microscopy coupled with energy dispersive spectrometry (SEM-EDS) is described. Results show the possibility of conducting topographic and qualitative analysis of automotive light bulbs from vehicles involved in traffic accidents on the basis of similarities between the waste glass material left on the filaments. This should provide evidence as to whether the bulbs were energized at the time of the accident.Keywords: Traffic accident; Forensic chemistry; Criminalistics; Scanning electron microscopy.Resumo. Um estudo comparativo entre três tipos de lâmpadas automotivas (convencional, halógena e lâmpada de xenônio HID) utilizando as técnicas microscopia de varredura linear acoplada ao espectrômetro de energia dispersiva (SEM-EDS) é apresentado. Os resultados apontam a possibilidade de realizar análise topográfica e qualitativa de lâmpadas automotivas de veículos envolvidos em acidentes de trânsito, com base nas semelhanças entre os resíduos vítreos deixados nos filamentos. Este método pode apresentar provas para saber se as lâmpadas foram energizadas no momento do acidente.Palavras-Chave: Acidentes de trânsito; Química forense; Criminalística; Microscópio de escaneamento eletrônico.
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