Quadrupole resonance spectroscopic study of narcotic materials

Timothy J. Rayner; Rebecca West; Allen N. Garroway; R. Lyndquist; James P. Yesinowski

doi:10.1117/12.266785

17 February 1997 Quadrupole resonance spectroscopic study of narcotic materials

Timothy J. Rayner, Rebecca West, Allen N. Garroway, R. Lyndquist, James P. Yesinowski

Proceedings Volume 2937, Chemistry- and Biology-Based Technologies for Contraband Detection; (1997) https://doi.org/10.1117/12.266785
Event: Enabling Technologies for Law Enforcement and Security, 1996, Boston, MA, United States

Abstract

Bulk narcotic detection systems based upon Quadrupole Resonance Analysis (QRA) technology have a major advantage over imaging technologies, in that QRA is chemical-specific and consequently has a lower rate of false alarms. QRA is a magnetic resonance technology which occurs as a result of the inherent molecular properties of the atomic nuclei in crystalline and amorphous solids. The QRA response is characterized by 1) the precessional frequency of the nucleus, and 2) the nature of the electric field gradient experienced by the nucleus,due to its molecular environment. Another important detection parameter is linewidth, resonant quality. All of these parameters depend on sample purity and manufacturing process. Quantum Magnetics recently carried out a study on the QRA signatures of various narcotic materials with the support of the US Army, US Customs, and the Office of National Drug Control Policy. The aim of the study was to fully characterize the variation in QRA spectroscopic parameters of different samples of cocaine base and cocaine hydrochloride. The results from this study ar discussed here.

Citation Download Citation

Timothy J. Rayner, Rebecca West, Allen N. Garroway, R. Lyndquist, and James P. Yesinowski "Quadrupole resonance spectroscopic study of narcotic materials", Proc. SPIE 2937, Chemistry- and Biology-Based Technologies for Contraband Detection, (17 February 1997); https://doi.org/10.1117/12.266785

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