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SEM/EDS analysis and characterization of gunshot residues from Brazilian lead-free ammunition.

Abstract：

:The exposition to heavy metal-rich airborne due to fire practicing has forced to the development of heavy metal-free environmental ammunition primers all over the world. Here we characterize the GSR elements present in the Brazilian lead-free ammunition produced by Companhia Brasileira de Cartuchos (CBC) and commercialized by MagTech in the U.S. and Europe under the name CleanRange centerfire cartridges. Both first and second generations of CleanRange in calibers 9 mm Luger, .40 S&W, .380 AUTO and .38 SPL were analyzed and compared to regular Brazilian CBC ammunition by scanning electron microscopy/energy dispersive spectroscopy. Differences in composition and morphology of GSR particles from the two generations of CleanRange were observed. The first generation ammunition (found in Europe) presented spherical particles, being strontium the only unique element detected. The second generation (found in the U.S.) produced irregular particles composed mostly by potassium, aluminum, silicon and calcium. We can conclude that identification of GSR derived from CBC second generation lead-free ammunition in suspects' hands may be impossible without the addition of a distinct metallic taggant in the primer composition by the manufacturer.

journal_name

Forensic Sci Int

journal_title

Forensic science international

authors

Martiny A,Campos AP,Sader MS,Pinto AL

doi

10.1016/j.forsciint.2007.07.005

subject

Has Abstract

pub_date

2008-05-02 00:00:00

pages

e9-17

issue

1

eissn

0379-0738

issn

1872-6283

pii

S0379-0738(07)00612-3

journal_volume

177

pub_type

杂志文章

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