Characterisation of 0.22 caliber rimfire gunshot residues by time-of-flight secondary ion mass spectrometry (TOF-SIMS): a preliminary study

Coumbaros, John; Kirkbride, K. Paul; Klass, Gunter; Skinner, William

doi:10.1016/s0379-0738(00)00421-7

Cited by 48 publications

(36 citation statements)

References 9 publications

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“…The other residues were collected by shaking the spent cartridge cases onto respective SEM stubs. Both methods have been used in previously published work for the collection of gunshot residue [6] [7]. A Cu particle finder grid was placed on top of the stubs.…”

Section: Methodsmentioning

confidence: 99%

Trace element profiling of gunshot residues by PIXE and SEM‐EDS: a feasibility study

2009

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We critically compare particle induced X-ray emission (PIXE) on the ion microprobe with scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) for the characterisation of gunshot residues (GSR). Samples of gunshot residue from several different firearms were collected. Individual particles of GSR were analysed by SEM-EDS using a 30keV electron beam focussed to ~10nm and PIXE using a 2.5MeV proton beam focussed to ~4 microns. PIXE revealed trace or minor elements undetectable by SEM-EDS, and could discriminate GSR indistinguishable by SEM-EDS. Introduction In order to demonstrate that a suspect in a criminal investigation has fired a weapon, police authorities routinely take swabs from the clothing, skin and hair of the suspect and use electron microscopy to search for gunshot residue (GSR) particles on the swabs. These particles are condensation products of the high temperature, high pressure reactions that occur when a firearm is fired and are known to be deposited at the crime scene and on the shooter [1]. The particles are made up of material from the primer, bullet, bullet jacket, cartridge casing and the gun barrel, are spherical, and are of the order of a few microns in diameter. There are several types of particle that are characteristic of gunshot residue, including those containing Pb, Ba and Sb [2].

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Section: Methodsmentioning

confidence: 99%

Trace element profiling of gunshot residues by PIXE and SEM‐EDS: a feasibility study

2009

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“…In recent years other instrumental techniques have been studied for the analysis of GSR; these include micro-X-ray fluorescence (XRF) [31,32], inductively coupled plasma/mass spectrometry (ICP/MS) [33], focused ion beam (FIB) [34], Raman microscopy [35], and time-of-flight secondary-ion mass spectrometry (TOF-SIMS) [36]. Micro-XRF cannot be used for single-particle examinations because of problems with spatial resolution.…”

Section: Methods and Instrumentationmentioning

confidence: 99%

Recent developments in methods of chemical analysis in investigations of firearm-related events

Zeichner

2003

Analytical and Bioanalytical Chemistry

103

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A review of recent (approximately the last ten years) developments in the methods used for chemical analysis in investigations of firearm-related events is provided. This review discusses:examination of gunshot (primer) residues (GSR) and gunpowder (propellant) residues on suspects and their clothing;detection of firearm imprints on the hands of suspects;identification of the bullet entry holes and estimation of shooting distance;linking weapons and/or fired ammunition to the gunshot entries, and estimation of the time since discharge.

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“…A utilização dessa munição em especial tem se mostrado extremamente problemática de ser evidenciada pelos GSR inorgânicos, mesmo utilizando SEM/ EDX. 31 Dessa forma, pesquisadores têm utilizado novas metodologias para a caracterização dos resíduos orgânicos (pólvora) e inorgânicos (Figura 1b), 32 utilizando técnicas de separação como eletroforese 13,33 e cromatografia líquida 34 ou espectrometria atômica (fluorescência de raios-X, XRF, [35][36][37] além da espectrometria de massas com plasma indutivamente acoplado, ICP-MS, 38,39 espectrometria de massas de íons secundários 40 e espectrometria de absorção atômica). 41 A análise de drogas de abuso é uma das áreas que desperta grande interesse da comunidade científica no que tange à química forense.…”

Section: Introductionunclassified

Química forense: perspectivas sobre novos métodos analíticos aplicados à documentoscopia, balística e drogas de abuso

Romão¹,

Schwab²,

Bueno³

et al. 2011

Quím. Nova

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Characterisation of 0.22 caliber rimfire gunshot residues by time-of-flight secondary ion mass spectrometry (TOF-SIMS): a preliminary study

Cited by 48 publications

References 9 publications

Trace element profiling of gunshot residues by PIXE and SEM‐EDS: a feasibility study

Trace element profiling of gunshot residues by PIXE and SEM‐EDS: a feasibility study

Recent developments in methods of chemical analysis in investigations of firearm-related events

Química forense: perspectivas sobre novos métodos analíticos aplicados à documentoscopia, balística e drogas de abuso

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