Add time:08/15/2019         Source:sciencedirect.com

A solid-phase microextraction (SPME) and gas chromatography–mass spectrometry (GC–MS) sampling and analysis method was developed for bis(diisopropylaminoethyl)disulfide (a degradation product of the nerve agent VX) in soil. A 30-min sampling time with a polydimethylsiloxane-coated fiber and high temperature alkaline hydrolysis allowed detection with 1.0 μg of VX spiked per g of agricultural soil. The method was successfully used in the field with portable GC–MS instrumentation. This method is relatively rapid (less than 1 h), avoids the use of complex preparation steps, and enhances analyst safety through limited use of solvents and decontamination of the soil before sampling.

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