Identification of gunshot residues by high resolution inductively coupled plasma mass spectrometry

Química Nova

Viebig, Sônia¹  Negrini Neto, Oswaldo¹  Rodrigues, Cláudio¹  Instituto de Pesquisas Energéticas e Nucleares, São Paulo¹  Sarkis, Jorge Eduardo de Souza¹  Instituto de Criminalística de São Paulo, São Paulo¹  Reis, Edson Luis Tocaia dos¹ 

关键词: forensic science;    gunshot residues;    inductively coupled plasma-mass spectrometry.;   

DOI  :  10.1590/S0100-40422004000300009

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The violence derived from crimes involving firearms represents one of the main concerns of society. For this reason modern techniques have emerged in forensic science to identify suspects at crime scenes. This work describes a methodology to identify residues present in the hands of suspect by using a high resolution inductively coupled plasma mass spectrometry and collection procedure based on ethylenediaminetetraacetic acid (EDTA) solution as a complexing agent in moistened swabs. In order to distinguish real gunshot residues from others types of residues present in the hand of suspect, ternary ratio per cent diagrams were developed for antimony (Sb), barium (Ba) and lead (Pb) detected on the hands of volunteers, before and immediately after shooting tests, revealing a remarkable difference in both situations.

【 授权许可】

Unknown