Ion mobility spectrometer

摘要

A field asymmetric ion mobility spectrometer comprises an ionizer, an ion filter, and an ion detector. The ion filter defines at least one ion channel along which ions may pass from the ionizer to the ion detector; and the ion filter comprises a plurality of electrodes disposed proximate the ion channel. The spectrometer further comprises electrode control means for controlling the electrodes such that a first drive electric field is generated along the length of the ion channel, and a second transverse electric field is simultaneously generated orthogonal to the first. Each of the plurality of electrodes is involved in generating a component of both the drive and transverse electric fields.