FAIMS cell with separate desolvation and carrier gas inlets

Details FAIMS cell with separate desolvation and carrier gas inlets FAIMS cell with separate desolvation and carrier gas inlets

2007-07-27

2009-12-29

Vanore, David A (Department: 2881)

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

C250S281000, C250S282000, C250S292000, C250S294000

Reexamination Certificate

active

07638765

ABSTRACT:
A method for analyzing ions includes providing a desolvation chamber in communication with an analytical gap of a FAIMS analyzer, via an ion inlet orifice. A flow of ions is introduced into the desolvation chamber along a flow path that is toward the ion inlet orifice and into the analytical gap of the FAIMS analyzer. A flow of a desolvation gas is provided into the desolvation chamber via a first gas inlet, such that a portion of the flow of the desolvation gas is counter-current to the flow of ions. A flow of a carrier gas is provided separately via a second gas inlet, which is defined downstream relative to the desolvation chamber. In particular, the composition of the carrier gas is different than the composition of the desolvation gas. Accordingly, the flow of the carrier gas is provided substantially into the analytical gap for transporting ions along a path between the ion inlet orifice and an ion outlet orifice of the analytical gap.

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