Periodic field focusing ion mobility spectrometer
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This invention is generally in the field of improved ion mobility spectrometry. The improvement lies in the use of periodic focusing electric fields that minimize the spatial spread of the migrating ions by keeping them in a tight radius about the axis of travel. The resulting enhancement in sensitivity is accomplished without a concomitant loss in resolution as would normally be expected when non-linear fields are used.
Gillig, Kent J.; Russell, David H. (2003). Periodic field focusing ion mobility spectrometer. United States. Patent and Trademark Office; Texas A&M University. Libraries. Available electronically from