scholarly journals Tiro-aztarnen identifikazioa, auzitegi-laborategien erronka

2015 ◽  
pp. 105-123
Author(s):  
Nora Unceta ◽  
Nagore Grijalba ◽  
Sandra Benito ◽  
Zuriñe Abrego ◽  
Alicia Sánchez ◽  
...  
Keyword(s):  
Gunshot Residue ◽  
Gunshot Residues

Azken urteotan, su-armen erabilera nabarmen handitu da gure gizartean eta horrek tiro egin ondoren sortutako partikulen analisirako metodologia berriak garatzea ekarri du. Krimen agertokian tiro-aztarnak (gunshot residue, GSR) osatzen dituzten konposatuen detekzio eta identifikazioak su-armen erabileraren ebidentzia fidagarria eskaintzen du. Tiro-aztarnak erretako eta erre gabeko partikulen multzoa da, munizioa erretzen denean sortutakoak eta su-armak berak, jaurtigaiak eta kartutxoak askatutako konposatuez osatuak. Tiro egin ostean, partikulak tiroa gertatu den tokiaren inguruan jalkitzen dira baina, batez ere, tiratzailearen gorputzean (eskuak, sudurra eta ilea) eta arropetan. Gaur egun, GSR partikulen ohiko analisia konposatu ez-organikoen identifikazioan oinarritzen da. Konposatu organikoen azterketak (organic gunshot residues, OGSR) lagin baten froga-balioa indartu dezake. Hala ere, gutxi dira OGSR-en dudarik gabeko identifikaziorako guztiz sentikorrak diren metodoak. Lan honetan beraz, tiro-aztarnen laginketa eta analisirako teknika aipagarrienak laburbildu eta berrikusten dira.

Analysis of primer gunshot residue particles by laser induced breakdown spectroscopy and laser ablation inductively coupled plasma mass spectrometry

The Analyst ◽  
2021 ◽  
Author(s):  
Courtney Vander Pyl ◽  
Claudia Martinez-Lopez ◽  
Korina Menking Hoggatt ◽  
Tatiana Trejos
Keyword(s):  
Rapid Detection ◽  
Inductively Coupled Plasma ◽  
Gunshot Residue ◽  
Laser Induced Breakdown Spectroscopy ◽  
Large Dataset ◽  
Gunshot Residues ◽  
Inductively Coupled ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Plasma Mass Spectrometry

LIBS and LAICPMS microchemical mapping for rapid detection of gunshot residues is reported for a large dataset of pGSR authentic items and microparticle standards, with accurate differentiation between shooter and non-shooter profiles (>88%).

scholarly journals Quantitative profile–profile relationship (QPPR) modelling: a novel machine learning approach to predict and associate chemical characteristics of unspent ammunition from gunshot residue (GSR)

The Analyst ◽  
2019 ◽  
Vol 144 (4) ◽  
pp. 1128-1139 ◽  
Author(s):  
Matteo D. Gallidabino ◽  
Leon P. Barron ◽  
Céline Weyermann ◽  
Francesco S. Romolo
Keyword(s):  
Machine Learning ◽  
Gunshot Residue ◽  
Chemical Characteristics ◽  
Learning Approach ◽  
Gunshot Residues ◽  
Machine Learning Approach ◽  
Predictive Approach

Possibility to associate gunshot residues with other residues or their original ammunition has been demonstrated using a novel predictive approach.

scholarly journals Detection of Gunshot Residues Using Mass Spectrometry

2014 ◽  
Vol 2014 ◽  
pp. 1-16 ◽  
Author(s):  
Regina Verena Taudte ◽  
Alison Beavis ◽  
Lucas Blanes ◽  
Nerida Cole ◽  
Philip Doble ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gold Standard ◽  
High Selectivity ◽  
Gunshot Residue ◽  
Chromatographic System ◽  
Gunshot Residues ◽  
X Ray ◽  
Metal Free ◽  
Forensic Scientists ◽  
Scanning Electron

In recent years, forensic scientists have become increasingly interested in the detection and interpretation of organic gunshot residues (OGSR) due to the increasing use of lead- and heavy metal-free ammunition. This has also been prompted by the identification of gunshot residue- (GSR-) like particles in environmental and occupational samples. Various techniques have been investigated for their ability to detect OGSR. Mass spectrometry (MS) coupled to a chromatographic system is a powerful tool due to its high selectivity and sensitivity. Further, modern MS instruments can detect and identify a number of explosives and additives which may require different ionization techniques. Finally, MS has been applied to the analysis of both OGSR and inorganic gunshot residue (IGSR), although the “gold standard” for analysis is scanning electron microscopy with energy dispersive X-ray microscopy (SEM-EDX). This review presents an overview of the technical attributes of currently available MS and ionization techniques and their reported applications to GSR analysis.

scholarly journals Detection of Organic and Inorganic Gunshot Residues from Hands using Complexing Agents and LC-MS/MS

2021 ◽  
Author(s):  
William Feeney ◽  
Korina Menking Hoggatt ◽  
Courtney Vander Pyl ◽  
Colby E. Ott ◽  
Suzanne Bell ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Gunshot Residue ◽  
Complexing Agents ◽  
Gunshot Residues ◽  
Inorganic Species

Gunshot residue (GSR) refers to a conglomerate consisting of both organic molecules (OGSR) and inorganic species (IGSR). Historically, forensic examiners have focused only on identifying the IGSR particles by their...

Characterization of lead-free gunshot residue analogs

2016 ◽  
Vol 8 (15) ◽  
pp. 3132-3139 ◽  
Author(s):  
Lashaundra A. Fambro ◽  
Ethan T. Miller ◽  
Deidre D. Vandenbos ◽  
Christopher R. Dockery
Keyword(s):  
Spectrochemical Analysis ◽  
Gunshot Residue ◽  
Lead Free ◽  
Gunshot Residues

Spectrochemical analysis and microscopy were used to identify statistically significant analytical markers present in simulated lead-free gunshot residues.

Pyrotechnic Residues in Gunshot Residue Analysis

1985 ◽  
Vol 43 ◽  
pp. 128-129
Author(s):  
H. M. Sagara ◽  
S. A. Schliebe ◽  
M. C. Kong
Keyword(s):  
Law Enforcement ◽  
Residue Analysis ◽  
Gunshot Residue ◽  
Particle Analysis ◽  
Dry Skin ◽  
X Ray ◽  
Skin Cells ◽  
Smokeless Powder ◽  
Carbon Coated ◽  
Detailed List

Particle analysis by scanning electron microscopy with energy-dispersive x- ray analysis is one of the current methods used in crime laboratories to aid law enforcement in identifying individuals who have recently fired or handled a firearm. During the discharge of a firearm, the high pressure caused by the detonation of the cartridge materials forces a portion of the generated gases through leaks in the firing mechanism of the weapon. These gases contain residues of smokeless powder, primer mixture, and contributions from the projectile itself. The condensation of these hot gases form discrete, micrometer-sized particles, which can be collected, along with dry skin cells, salts, and other hand debris, from the hands of a shooter by a simple adhesive lift technique. The examination of the carbon-coated adhesive lifts consist of time consuming systematic searches for high contrast particles of spherical morphology with the characteristic elemental composition of antimony, barium and lead. A detailed list of the elemental compositions which match the criteria for gunshot residue are discussed in the Aerospace report.

scholarly journals Evaluation of the sub-surface morphology and composition of gunshot residue using focussed ion beam analysis

2019 ◽  
Vol 297 ◽  
pp. 100-110 ◽  
Author(s):  
Nick Lucas ◽  
Kelsey E. Seyfang ◽  
Andrew Plummer ◽  
Michael Cook ◽  
K. Paul Kirkbride ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Ion Beam ◽  
Gunshot Residue ◽  
Ion Beam Analysis ◽  
Beam Analysis ◽  
Focussed Ion Beam
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