Rapid in situ detection of street samples of drugs of abuse on textile substrates using microRaman spectroscopy

Ali, Essam M. A. and Edwards, Howell G. M. and Scowen, Ian J. (2011) Rapid in situ detection of street samples of drugs of abuse on textile substrates using microRaman spectroscopy. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 80 (1). pp. 2-7. ISSN 1386-1425

Full content URL: http://dx.doi.org/10.1016/j.saa.2010.11.001

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Item Type:Article
Item Status:Live Archive

Abstract

Trace amounts of street samples of cocaine hydrochloride and N-methyl-3,4-methylenedioxy-amphetamine (MDMA) on natural and synthetic textiles were successfully detected in situ using confocal Raman microscopy. The presence of some excipient bands in the spectra of the drugs did not prevent the unambiguous identification of the drugs. Raman spectra of the drugs were readily obtained without significant interference from the fibre substrates. Interfering bands arising from the fibre natural or synthetic polymer structure and/or dye molecules did not overlap with the characteristic Raman bands of the drugs. If needed, interfering bands could be successfully removed by spectral subtraction. Also, Raman spectra could be acquired from drug particles trapped between the fibres of highly fluorescent textile specimens. The total acquisition time of the spectra of the drug particles was 90 s accomplished non-destructively and without detachment from their substrates. Sample preparation was not required and spectra of the drugs could be obtained non-invasively preserving the integrity of the evidential material for further analysis. © 2010 Elsevier B.V. All rights reserved.

Keywords:Clothing, Cocaine hydrochloride, Forensic detection, MDMA, Micro Raman Spectroscopy, Raman scattering, Raman spectroscopy, Textiles, 3,4 methylenedioxymethamphetamine, cocaine, coloring agent, street drug, chemistry, conference paper, forensic science, human, methodology, Raman spectrometry, textile, Cocaine, Coloring Agents, Forensic Sciences, Humans, N-Methyl-3,4-methylenedioxyamphetamine, Spectrum Analysis, Raman, Street Drugs, Textiles
Subjects:F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
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ID Code:13020
Deposited On:19 Mar 2014 18:52

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