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Method and apparatus for selecting inlets of a multiple inlet FAIMS

  • US 7,041,969 B2
  • Filed: 03/02/2005
  • Issued: 05/09/2006
  • Est. Priority Date: 03/03/2004
  • Status: Expired due to Fees
First Claim
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1. An apparatus for selecting between a first ion inlet orifice and a second ion inlet orifice of a FAIMS device, comprising:

  • a first electrode defining a first ion inlet orifice within a first portion thereof, and defining a second ion inlet orifice within a second portion thereof;

    a second electrode disposed in a spaced-apart relationship with the first electrode, a space between the first electrode and the second electrode defining a FAIMS analyzer region;

    at least a cover for selectably covering the first ion inlet orifice and the second ion inlet orifice, the at least a cover larger than either the first ion inlet orifice or the second ion inlet orifice and providing for uncovering of a substantial area about the first ion inlet orifice and the second ion inlet orifice; and

    ,an actuator interface for being driven by an actuator and for moving the at least a cover from a first position in which the first ion inlet orifice is uncovered by the at least a cover and the second ion inlet orifice is covered by a first portion of the at least a cover, to a second other position in which the second ion inlet orifice is uncovered by the at least a cover and the first ion inlet orifice is covered by a second portion of the at least a cover.

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