A forensic study: Lead determination in gunshot residues

Autor(es)

Salles, Maiara O. ^[1] ; Naozuka, Juliana ^[2] ; Bertotti, Mauro ^[1]

Afiliação do(s) autor(es)

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

^[2] Univ Fed Sao Paulo, Dept Ciencias Exatas & Terra, BR-09972270 Diadema, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Microchemical Journal; v. 101, p. 49-53, MAR 2012.
• Citações Web of Science: 7

Resumo

Electrochemical lead analyses of gunshot residues (GSRs) were performed using an acidic solution with a bare gold microelectrode in the presence of chloride ions. GSRs from four different guns (0.38 in. revolver, 12 caliber pump-action shotgun, 0.38 repeating rifle, and a 0.22 caliber semi-automatic rifle) and six different types of ammunition (CleanRange (R), normal, semi-jacketed, especial 24g (R), 3T (R), CBC (R), and Eley (R)) were analyzed. Results obtained with the proposed methodology were compared with those from an atomic absorption spectrometry analysis, and a paired Student's t-test indicated that there was no significant difference between them at the 95% confidence level. With this methodology, a detection limit of 1.7 nmol L-1 (3 sigma/slope), a linear range between 10 and 100 nmol L-1, and a relative standard deviation of 2.5% from 10 measurements were obtained. (C) 2011 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