Artículos de revistas
Use of a gold microelectrode for discrimination of gunshot residues
Fecha
2012Registro en:
SENSORS AND ACTUATORS B-CHEMICAL, LAUSANNE, v. 166, n. 4, pp. 848-852, MAY 20, 2012
0925-4005
10.1016/j.snb.2012.02.097
Autor
Salles, Maiara Oliveira
Bertotti, Mauro
Paixão, Thiago Regis Longo Cesar da
Institución
Resumen
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.