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Proceedings Paper

Multidimensional detection of explosives and explosive signatures via laser electrospray mass spectrometry
Author(s): John J. Brady; Paul M. Flanigan; Johnny J. Perez; Elizabeth J. Judge; Robert J. Levis
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Paper Abstract

Nitro- and inorganic-based energetic material is vaporized at atmospheric pressure using nonresonant, 70 femtosecond laser pulses prior to electrospray post-ionization and transfer into a time-of-flight mass spectrometer for mass analysis. Measurements of a nitro-based energetic molecule, cyclotrimethylenetrinitramine (RDX), adsorbed on metal and dielectric surfaces indicate nonresonant vaporization of intact molecules, demonstrating the universality of laser electrospray mass spectrometry (LEMS) technique for explosives. In addition, RDX is analyzed at a distance of 2 meters to demonstrate the remote detection capability of LEMS. Finally, the analysis and multivariate statistical classification of inorganic-based explosives containing ammonium nitrate, chlorate, perchlorate, black powder, and an organic-based explosive is presented, further expanding the capabilities of the LEMS technique for detection of energetic materials.

Paper Details

Date Published: 4 May 2012
PDF: 9 pages
Proc. SPIE 8358, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII, 83580X (4 May 2012); doi: 10.1117/12.919214
Show Author Affiliations
John J. Brady, U.S. Army Research Lab. (United States)
Paul M. Flanigan, Temple Univ. (United States)
Johnny J. Perez, Temple Univ. (United States)
Elizabeth J. Judge, Los Alamos National Lab. (United States)
Robert J. Levis, Temple Univ. (United States)


Published in SPIE Proceedings Vol. 8358:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII
Augustus Way Fountain, Editor(s)

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