Application of LC−QTOF/MS for the validation and determination of organic explosive residues on Ionscan swabs

Suppajariyawat, Praew and Gonzalez-Rodriguez, Jose (2021) Application of LC−QTOF/MS for the validation and determination of organic explosive residues on Ionscan swabs. Science and Justice, 61 (6). pp. 697-703. ISSN 1355-0306

Full content URL: https://doi.org/10.1016/j.scijus.2021.09.001

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Application of LC−QTOF/MS for the validation and determination of organic explosive residues on Ionscan swabs
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Abstract

The identification and confirmation of trace explosive residues along with potential precursors and degradation products require a comprehensive laboratory analysis procedure. This study presents the determination of organic explosives consisting of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), 2,4,6-trinitrotoluene (TNT), 2,4,6,N-tetranitro-N-methylaniline (Tetryl), 1,3,5-trinitrobenzene (1,3,5-TNB) and pentaerythritol tetranitrate (PETN) by a high-resolution liquid chromatography quadrupole time-of-flight mass spectrometry (LC−QTOF/MS). The qualitative
information including retention time, collision energy, precursor ions, and characteristic fragmentation pattern of each explosive were collected using an atmospheric pressure chemical ionization (APCI) in negative ion mode. The
separation efficiency among five compounds was greatly achieved in this study. Four real explosive samples consisting of TNT, RDX, PETN and Tetryl and 12 Ionscan quality control swabs from the Royal Thai Army were also tested to validate and verify the viability of the GC-MS method used to validate results from an Ionscan system.
The results showed that LC−QTOF/MS is a powerful technique for the identification and confirmation of thermally unstable organic explosives on Ionscan swabs compared to a conventional GC−MS technique.

Keywords:organic explosive, Ionscan, liquic chromatography mass spectrometry, forensic science, quadrupole time-of-flight mass spectrometry
Subjects:F Physical Sciences > F100 Chemistry
F Physical Sciences > F410 Forensic Science
F Physical Sciences > F180 Analytical Chemistry
Divisions:College of Science > School of Chemistry
ID Code:47643
Deposited On:21 Dec 2021 17:09

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