Forensic and security applications of a long-wavelength dispersive Raman system
Ali, Esam M.A. Edwards, Howell G.M. Cox, R.
Ali, Esam M.A.
Edwards, Howell G.M.
Cox, R.
Publication Date
2015
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2014-11-12
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Abstract
A novel dispersive system operating at 1064-nm excitation and coupled with transfer electron InGaAs photocathode and electron bombardment CCD technology has been evaluated for the analysis of drugs of abuse and explosives. By employing near-IR excitation at 1064-nm excitation wavelength has resulted in a significant damping of the fluorescence emission compared to 785-nm wavelength excitation. Spectra of street samples of drugs of abuse and plastic explosives, which usually fluoresce with 785-nm excitation, are readily obtained in situ within seconds through plastic packaging and glass containers using highly innovative detector architecture based upon a transfer electron (TE) photocathode and electron bombarded gain (EB) technology that allowed the detection of NIR radiation at 1064nm without fluorescence interference. This dispersive near-IR Raman system has the potential to be an integral part in the armoury of the forensic analyst as a non-destructive tool for the in-situ analysis of drugs of abuse and explosives. Copyright (c) 2015 John Wiley & Sons, Ltd.
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Ali EMA, Edwards HGM and Cox R (2015) Forensic and security applications of a long-wavelength dispersive Raman system. Journal of Raman Spectroscopy. 46(3): 322-326.
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