Analysis of organic volatile residues in 9mm spent cartridges

Weyermann, Céline; Belaud, Vanessa; Riva, Fabiano; Romolo, Francesco Saverio

doi:10.1016/j.forsciint.2009.01.005

Cited by 54 publications

(95 citation statements)

References 12 publications

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“…Numerous physical and chemical phenomena can be considered, such as degradation, evaporation, diffusion, migration, drying, oxidation or polymerisation. If the reaction kinetics are reproducible under controlled conditions, it is possible to estimate the time since the transfer of a trace (e.g., the time of contact between a person's finger and a surface [27,28] or the time at which a gun was fired [29,30]). Chemical kinetics aim to understand the influencing factors and to develop theories in order to predict these rates.…”

Section: Agingmentioning

confidence: 99%

Situating forensic traces in time

Weyermann

Ribaux

2012

Science & Justice

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Situating events and traces in time is an essential problem in investigations. To date, among the typical questions issued in forensic science, time has generally been unexplored. The reason for this can be traced to the complexity of the overall problem, addressed by several scientists in very limited projects usually stimulated by a specific case. Considering that such issues are recurrent and transcend the treatment of each trace separately, the formalisation of a framework to address dating issues in criminal investigation is undeniably needed. Through an iterative process consisting of extracting recurrent aspects discovered from the study of problems encountered by practitioners and reported in the literature, common mechanisms were extracted and provide understanding of underlying factors encountered in forensic practice. Three complementary approaches are thus highlighted and described to formalise a preliminary framework that can be applied for the dating of traces, objects, persons and indirectly events.

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Section: Agingmentioning

confidence: 99%

Situating forensic traces in time

Weyermann

Ribaux

2012

Science & Justice

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“…Analysis of organic compounds in GSR was implemented by a combination of solid-phase microextraction (SPME) and gas chromatography mass spectrometry (GC-MS) technique [10], desorption electrospray ionization mass spectrometry (DESI-MS) [5] and fourier transform infrared (FTIR) spectroscopy [11].…”

Section: Introductionmentioning

confidence: 99%

Copper Determination in Gunshot Residue by Cyclic Voltammetric and Inductive Coupled Plasma-Optical Emission Spectroscopy

Hashim

Zain

Jaafar

2016

MATEC Web of Conferences

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Abstract. Analysis of gunshot residue (GSR) is a crucial evidences for a forensic analyst in the fastest way. GSR analysis insists a suitable method provides a relatively simple, rapid and precise information on the spot at the crime scene. Therefore, the analysis of Cu(II) in GSR using cyclic voltammetry (CV) on screen printed carbon electrode (SPCE) is a better choice compared to previous alternative methods such as Inductive Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) those required a long time for analysis. SPCE is specially designed to handle with microvolumes of sample such as GSR sample. It gives advantages for identification of copper in GSR on-site preliminary test to prevent the sample loss on the process to be analyzed in the laboratory. SPCE was swabbed directly on the shooter's arm immediately after firing and acetate buffer was dropped on SPCE before CV analysis. For ICP-OES analysis, cotton that had been soaked in 0.5 M nitric acid was swabbed on the shooter's arm immediately after firing and kept in a tightly closed sampling tube. Gold coated SPCE that had been through nanoparticles modification exhibits excellent performance on voltammograms. The calibration was linear from 1 to 50 ppm of copper, the limit of detection for copper was 0.3 ppm and a relative standard deviation was 6.1 %. The method was successfully applied to the determination of copper in GSR. The Cu determination on SPCE was compared and validated by ICP-OES method with 94 % accuracy.

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“…For instance, the main organic compounds detected in smokeless powders are diphenylamine (DPA), a stabilizer to prevent accumulation of the decomposing materials, and ethyl centralite (EC), a deterrent to slow the burning rate of the smokeless powder. Other additives include dinitrotoluene (DNT) isomers (i.e., 2,3-DNT, 2,4-DNT, and 2,6-DNT), methyl centralite (MC), and dialkyl phthalates [Andrasko et al, 1998;Reardon et al, 2000;Weyermann et al, 2009].…”

Section: Propellantmentioning

confidence: 99%

“…These color tests react to the presence of functional groups but cannot be used as a confirmation of GSR presence López-López et al, 2012]. Therefore, organic analysis is more reliable and is necessary to confirm the presence of target organic compounds in GSR [Burleson et al, 2009;Silva et al, 2009;Weyermann et al, 2009;Zeichner et al, 2009;Brożec-Mucha et al, 2011;Arndt et al 2012]. However, most of these techniques require time consuming sample preparation and are destructive;…”

Section: Analysis Of Organic Components In Gsr From the Hands Of Shoomentioning

confidence: 99%

“…To determine time since discharge and characterize the residues in spent cartridges, several techniques have been used such as SPME to GC-MS and IMS [Andrasko et al, 1999;Weyermann et al, 2009]. The SPME method consists of extracting the headspace of the spent cartridge to detect volatile organic compounds [Andrasko et al, 1998;Wilson et al, 2003].…”

Section: Analysis Of Organic Components In Gsr From Spent Cartridgesmentioning

confidence: 99%

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Fast Detection and Chemical Characterization of Gunshot Residues by CMV-GC-MS and LIBS

Tarifa¹

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Analysis of organic volatile residues in 9mm spent cartridges

Cited by 54 publications

References 12 publications

Situating forensic traces in time

Situating forensic traces in time

Copper Determination in Gunshot Residue by Cyclic Voltammetric and Inductive Coupled Plasma-Optical Emission Spectroscopy

Fast Detection and Chemical Characterization of Gunshot Residues by CMV-GC-MS and LIBS

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