Explosives determination with a micro-fabricated differential mobility spectrometer

Explosives determination with a micro-fabricated differential mobility spectrometer 

Quantitative response curves for the nitrobenzenes and nitrotoluenes were obtained for a continuous vapor stream of chemical in air and the plots extended from 0.1 to 100 ppb with an anticipated systematic error from surface adsorption at low vapor concentrations. At the high concentrations, the curves begin to flatten as seen with all IMS and DMS response owing to saturation of the ion source region, a complication in all uses of gas-phase ion chemistry with sources at ambient pressure. Detection limits from the micro-fabricated DMS analyzer were suggestive of suitable analytical performance for a trace explosives detector [57], 

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