On the evaporation dynamics of trinitrotoluene microparticles on the glass surface

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On the evaporation dynamics of trinitrotoluene microparticles on the glass surface	54 KB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1615/IntJEnergeticMaterialsChemProp.2021038342

Title: On the evaporation dynamics of trinitrotoluene microparticles on the glass surface
Creator: Tivileva, M. I.
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Gruznov, V. M.
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Baldin, M. N.
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Vorozhtsov, Alexander B.
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Kikhtenko, A. V.
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Titov, Sergey S.
Date: 2021
DOI: 10.1615/IntJEnergeticMaterialsChemProp.2021038342
Description: The results of measuring the time dependence of the concentration of trinitrotoluene (TNT) vapor over its solid microconcentrations on the glass surface with a low TNT concentration on the surface of 100 ng/cm2 are presented. Such microconcentrations of traces are typical for the conditions of anti-terrorist control of objects for the presence of TNT. The measurements were made using a portable multicapillary gas chromatograph (GC) EKHO-V-IDTS (Russia) with TNT vapor concentration. The threshold for determining the concentration of TNT vapor by the EKHO-V-IDTS gas chromatograph corresponds to the modern level and is equal to 10-14 g/cm3. Vapor sampling is performed by a vortex sampling device (VSD), which is used in the anti-terrorist control of objects. It is shown that the initial surface concentration of TNT traces of 100 ng/cm2 on the glass surface decreases to 12 ng/cm2 in a time of 2.6 h due to evaporation into an open half-space under laboratory conditions. The vapor concentration over the residual TNT concentration of 12 ng/cm2 corresponds to the GC sensitivity threshold for TNT vapor concentration equal to 10-14 g/cm3.