APPARATUS AND METHOD FOR ADJUSTMENT OF ION SEPARATION RESOLUTION IN FAIMS

摘要

An apparatus for controllably varying specificity of a FAIMS-based ion separation includes a FAIMS analyzer region that is defined between a first electrode surface and a second electrode surface. The FAIMS analyzer region in communication with an ionization source for providing a flow of ions including a known ion, and with an ion outlet for extracting ions including the known ion from the FAIMS analyzer region. The first and second electrode surfaces are for having an asymmetric waveform voltage applied thereacross so as to define an average ion flow path for the known ion traversing therebetween. The apparatus further includes an actuator for controllably varying the length of the average ion flow path.