In-situ detection of single particles of explosive on clothing with confocal Raman microscopy

Ali, Essam M. A. and Edwards, Howell G. M. and Scowen, Ian J. (2009) In-situ detection of single particles of explosive on clothing with confocal Raman microscopy. Talanta, 78 (3). pp. 1201-1203. ISSN 0039-9140

Full content URL: http://dx.doi.org/10.1016/j.talanta.2008.12.038

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Item Type:Article
Item Status:Live Archive

Abstract

Confocal Raman microscopy is shown to detect picogram quantities of explosives in-situ on undyed natural and synthetic fibres, and coloured textile specimens leaving potentially evidential materials unaltered. Raman spectra were obtained from pentaerythritol tetranitrate (PETN), trinitrotoluene (TNT), and ammonium nitrate particles trapped between the fibres of the specimens. Despite the presence of spectral bands arising from the natural and synthetic polymers and dyed textiles, the explosive substances could be identified by their characteristic Raman bands. Furthermore, Raman spectra were obtained from explosives particles trapped between highly fluorescent clothing fibres. Raman spectra were collected from explosives particles with maximum dimensions in the range 5-10 μm. Spectra of the explosives on dyed and undyed clothing substrates were readily obtained in-situ within 90 s and without sample preparation. © 2008 Elsevier B.V. All rights reserved.

Keywords:Ammonium nitrates, Confocal Raman microscopy, Explosive substances, Forensic, In-situ, Pentaerythritol tetranitrate, Raman bands, Raman spectrum, Sample preparations, Single particles, Spectral bands, Synthetic fibres, Synthetic polymers, Ammonium compounds, Fabrics, Natural polymers, Nitration, Raman scattering, Raman spectroscopy, Synthetic fibers, Explosives, explosive, pentaerythrityl tetranitrate, trinitrotoluene, article, clothing, evaluation, forensic science, instrumentation, methodology, Raman spectrometry, terrorism, Clothing, Explosive Agents, Forensic Sciences, Spectrum Analysis, Raman, Terrorism, Trinitrotoluene
Subjects:F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
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ID Code:13039
Deposited On:19 Mar 2014 18:53

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