Abstract
Results of the study of the conditions of detection of traces of marking agents added to industrial plastic explosives in air using preconcentration and subsequent analysis on a ECHO-V-IDVS modernized gas chromatograph with a polycapillary column, an ionization detector of a varying selectivity (IDVS), and atmospheric air as a carrier gas are presented. A significant effect of air humidity on the limits of detection for 4-nitrotoluene and 2,3-dimethyl-2,3-dinitrobutane is demonstrated; the highest IDVS sensitivity was observed at the humidity of the carrier gas less than 8.5 mg/m3. For the preconcentration of marking agents, concentrators based on Tenax adsorbent or those produced as metal wire grids coated with a stationary phase are most efficient. The limits of detection for vapors of marking agents in sampling 1 L of air to a concentrator are 22 pg/cm3 for 4-nitrotoluene and 0.1 pg/cm3 for 2,3-dimethyl-2,3-dinitrobutane.
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Original Russian Text © V.M. Gruznov, M.N. Baldin, A.P. Efimenko, E.M. Maksimov, I.I. Naumenko, V.G. Pronin, 2015, published in Zhurnal Analiticheskoi Khimii, 2015, Vol. 70, No. 2, pp. 183–188.
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Gruznov, V.M., Baldin, M.N., Efimenko, A.P. et al. Rapid gas-chromatographic determination of marking agents added to the industrial plastic explosives in air. J Anal Chem 70, 207–212 (2015). https://doi.org/10.1134/S1061934814120053
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DOI: https://doi.org/10.1134/S1061934814120053