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- Title
Rapid gas-chromatographic determination of marking agents added to the industrial plastic explosives in air.
- Authors
Gruznov, V.; Baldin, M.; Efimenko, A.; Maksimov, E.; Naumenko, I.; Pronin, V.
- 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/m. 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/cm for 4-nitrotoluene and 0.1 pg/cm for 2,3-dimethyl-2,3-dinitrobutane.
- Subjects
NITROTOLUENE; ETHANES; VOLATILE organic compounds; IONIZATION (Atomic physics); CHEMICAL preconcentration; ADDITIVES in explosives
- Publication
Journal of Analytical Chemistry, 2015, Vol 70, Issue 2, p207
- ISSN
1061-9348
- Publication type
Article
- DOI
10.1134/S1061934814120053