Mapping smokeless powder residue on PVC pipe bomb fragments using total vaporization solid phase microextraction

Forensic Science International : Synergy
Dana Bors, John V Goodpaster

Abstract

Quantitating post-blast explosive residue is not a common practice in crime labs as it is typically not legally relevant. There is value in quantitation, however, if the distribution of residues on Improvised Explosive Devices (IEDs) can help guide future sample collection and/or method development. Total vaporization solid phase microextraction gas chromatography mass spectrometry (TV-SPME/GC/MS) was used to quantify residues of double-base smokeless powder (DBSP), which includes nitroglycerin (NG), diphenylamine (DPA), and ethyl centralite (EC) on post-blast PVC pipe bomb fragments. The analytical method could separate the three constituents in under 5min with a detection limit under 1ppb, which demonstrates high throughput while maintaining high sensitivity. The method was optimized for nitroglycerin, as it is the most indicative of DBSP. The average mass of nitroglycerin recovered from an entire PVC device was 1.0mg. The average mass of diphenylamine recovered was much lower (24μg) and only one device had detectable levels of EC. The typical concentration of NG on any given fragment was approximately 15-30ppm (μg NG/g fragment). However, there was no correlation between the mass of a fragment and the mass of residue upon it...Continue Reading

Citations

Jun 20, 2020·Environmental Science and Pollution Research International·Mohammad Beiranvand, Alireza Ghiasvand
Jan 2, 2021·Forensic Science International : Synergy·Douglas J KlapecJulie Pannuto
Oct 22, 2020·Toxicology Mechanisms and Methods·Lailah Cristina de Carvalho AbrãoIsarita Martins
Nov 9, 2018·Analytical Chemistry·Ewelina MistekIgor K Lednev
Sep 3, 2020·Journal of the American Society for Mass Spectrometry·Callum BonnarK Paul Kirkbride

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