Mr. Denis Turbin Profile

Denis Turbin

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Proceedings Article | 7 October 2019 Presentation + Paper

Application of a cyclone collector with a recirculating liquid phase for concentrating microparticles, localized as traces on surfaces

Artem Akmalov, Alexander Chistyakov, Gennadii Kotkovskii, Denis Turbin

Proceedings Volume 11166, 1116602 (2019) https://doi.org/10.1117/12.2532328

KEYWORDS: Atmospheric particles, Explosives, Aerosols, Particles, Biological research, Chemical analysis

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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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