Use of a gold microelectrode for discrimination of gunshot residues

Autor(es)

Salles, Maiara O. ^[1] ; Bertotti, Mauro ^[1] ; Paixao, Thiago R. L. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SENSORS AND ACTUATORS B-CHEMICAL; v. 166, p. 848-852, MAY 20 2012.
• Citações Web of Science: 9

Resumo

Gunshot residues (GSR) can be used in forensic evaluations to obtain information about the type of gun and ammunition used in a crime. In this work, we present our efforts to develop a promising new method to discriminate the type of gun {[}four different guns were used: two handguns (0.38 revolver and 0.380 pistol) and two long-barrelled guns (12-calibre pump-action shotgun and 0.38 repeating rifle)] and ammunition (five different types: normal, semi-jacketed, full-jacketed, green, and 3T) used by a suspect. The proposed approach is based on information obtained from cyclic voltammograms recorded in solutions containing GSR collected from the hands of the shooters, using a gold microelectrode; the information was further analysed by non-supervised pattern-recognition methods {[}(Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA)]. In all cases (gun and ammunition discrimination), good separation among different samples in the score plots and dendrograms was achieved. (C) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 06/60078-0 - Desenvolvimento de sensor eletroquímico para monitoramento de chumbo em resíduos de disparos de armas de fogo
• Beneficiário: Maiara Oliveira Salles
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 09/07859-1 - Desenvolvimento de línguas eletrônicas voltamétricas visando à caracterização e identificação de processos de adulteração e falsificação em biocombustíveis
• Beneficiário: Thiago Regis Longo Cesar da Paixão
• Modalidade de apoio: Auxílio à Pesquisa - Regular