1. A benchtop ion mobility spectrometer with ultra high resolving power was designed and constructed with Resistive Glass tubes and a photo-etched Bradbury-Nielsen type ion gate. 2. Resolving power of 64-150 was achieved for background ions, a calibrant and a chemical warfare simulant. 3. Greater resolving power was achieved with the DART SVP ion source compared to the corona discharge source. 4. Good agreement was found between the measured reduced mobility values of DtBP and DMMP and those published in the literature. 5. Four micrograms of DtBP and twenty four micrograms of DMMP were detected with ease and with signal to noise ratios greater than 10.
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