Laser Desorption of Traces of Explosives in Ion Mobility Spectrometry

Abstract

The efficiency of a YAG:Nd3+laser (λ = 1064 nm) and a diode continuous laser (λ = 440 nm) to initiate laser desorption of traces of trinitrotoluene (TNT) and cyclotrimethylenetrinitramine (RDX) is quantitatively compared with use of mass spectrometry. It is shown that a pulsed neodymium laser is more promising for creating a device of contactless sampling for ion mobility spectrometers.

References
[1] C. S.Pedersen, F. R. Lauritsen, Alexey Sysoev, A-K. Viitanen, J. M. Mäkelä, A. Adamov, J. Laakia, T.Mauriala, T. Kotiaho, “Characterization of Proton-Bound Acetate Dimers in Ion Mobility Spectrometry”, J Am Soc Mass Spectrom 19, 1361–1366 (2008), doi: 10.1016/j.jasms.2008.05.024.


[2] A. Sysoev, A. Adamov, J. Viidanoja, R.A. Ketola, E. Kärpänoja, H. Paakkanen R. Kostiainen, and T. Kotiaho, “Interfacing an aspiration ion mobility spectrometer to a triple quadrupole mass spectrometer”, Rev. Sci. Instrum. 78, 044101 (2007), doi: 10.1063/1.2723742.


[3] Akmalov A.E, Bogdanov A.S, Kotkovskii G.E, Spitsyn E.M, Sychev A.V., Perederii A.N, Chistyakov A.A. “Laser desorption ion mobility increment spectrometer for detection of ultralow concentrations of nitro compounds”, Instruments and Experimental Techniques, 56, 3, 309-316 (2013), doi: 10.1134/S0020441213030159.


[4] Akmalov A.E., Chistyakov A.A., Kotkovskii, G. E., «Laser desorption of explosives as a way to create an effective non-contact sampling device», Proceedings of SPIE - The International Society for Optical Engineering, 9652, art. no. 965206 (2015).


[5] Lazneva, E.V., ”Laser desorption,” Publishing House of Leningrad University, Leningrad, 4-30 (1990).


[6] Wynn, C.M., Palmazzi, S., Kunz, R.,”Detection of condenced-phase explosives via laser-induced vaporization, photodissociation and resonant excitation,” Applied Optics 47(31), (2008).