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7 October 2019 Application of a cyclone collector with a recirculating liquid phase for concentrating microparticles, localized as traces on surfaces
Artem E. Akmalov, Alexander A. Chistyakov, Gennadii E. Kotkovskii, Denis S. Turbin
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Proceedings Volume 11166, Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies III; 1116602 (2019) https://doi.org/10.1117/12.2532328
Event: SPIE Security + Defence, 2019, Strasbourg, France
Abstract
The study of using a cyclone collector with a liquid recirculation phase for collecting microparticles of TNT (trinitrotoluene) explosive, located in the form of traces on solid and fibrous surfaces was conducted in this work. Fragments of fibrous nonwoven material, as well as flax fabric fragments were used as a basis on which TNT powder was randomly distributed. The TNT sample area was about 900 cm2 . The cyclone collector with recirculating liquid phase originally designed for aerosol particles collection was used as a device for pre-concentration of explosives particles. Inlet air velocity was equal to 500 cm3 /min. Quantitative measurements of collected TNT amount were provided by gas chromatography – mass-spectrometry method. Experiments to compare the efficiency of cyclone collector sampling to the currently used methods of explosives microparticles collection - by wiping of surfaces and by dry filtration - were carried out. Cyclone collector showed high collection efficiency, amounting to 91% by weight of originally TNT spread on the surface that is more than 3 times higher than efficiencies of the wiping method (24% of the total mass of the trace) and the dry filtration method (23% of the total mass of the trace).
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Artem E. Akmalov, Alexander A. Chistyakov, Gennadii E. Kotkovskii, and Denis S. Turbin "Application of a cyclone collector with a recirculating liquid phase for concentrating microparticles, localized as traces on surfaces", Proc. SPIE 11166, Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies III, 1116602 (7 October 2019); https://doi.org/10.1117/12.2532328
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KEYWORDS
Atmospheric particles
Explosives
Aerosols
Particles
Biological research
Chemical analysis
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