Gas-Chromatographic Determination of Trace Isobutyl S-2-(N,N-Diethylamino)ethyl Methylphosphonothioate (VX-like Compound) in Soil and Construction Materials

Author： Stan'kov I. N.   Sergeeva A. A.   Sitnikov V. B.   Derevyagina I. D.   Morozova O. T.  

Publisher： MAIK Nauka/Interperiodica

ISSN： 1061-9348

Source： Journal of Analytical Chemistry, Vol.59, Iss.3, 2004-03, pp. : 260-265

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Abstract

Procedures were developed for the determination of trace isobutyl S-2-(N,N-diethylamino)ethyl methylphosphonothioate (IBDAEMP) in soil and construction materials by gas chromatography at a level of 1 × 10–9%. The procedures are based on the extraction of IBDAEMP from test materials using an aqueous solution of monoethanolamine or chloroform saturated with ammonia, the back extraction of IBDAEMP into hexane, the evaporation of the hexane solution (with an addition of HCl) to dryness, the treatment of the residue with a solution of silver nitrate in methanol for obtaining O-isobutyl O-methyl methylphosphonate, and gas-chromatographic separation on an open tubular column with the HP–5MS chemically modified stationary phase with flame-photometric detection.

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