Apparatus and method for adjustment of ion separation...

Details Apparatus and method for adjustment of ion separation... Apparatus and method for adjustment of ion separation...

2007-06-05

2007-06-05

Nguyen, Kiet T. (Department: 2881)

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

C250S286000

Reexamination Certificate

active

11285153

ABSTRACT:
An apparatus for controllably varying specificity of a FAIMS-based ion separation includes a first electrode surface portion defining an ion inlet within a portion thereof and a second electrode surface portion defining an ion outlet within a portion thereof. The second electrode surface portion is spaced-apart from the first electrode surface portion along a first direction and disposed in a facing relationship relative to the first electrode surface portion so as to define a FAIMS analyzer region therebetween. An intermediate electrode is disposed between the first electrode surface portion and the second electrode surface portion, the intermediate electrode for defining a transition point of an average ion flow path between the ion inlet and the ion outlet. An actuator is provided for controllably moving the intermediate electrode relative to each of the first electrode surface portion and the second electrode surface portion, for translating the transition point so as to controllably vary the length of the average ion flow path.

REFERENCES:
patent: 6653627 (2003-11-01), Guevremont et al.
patent: 6727496 (2004-04-01), Miller et al.
patent: 6770875 (2004-08-01), Guevremont et al.
patent: 2004/0124350 (2004-07-01), Miller et al.
patent: 2006/0151694 (2006-07-01), Guevremont et al.
Guevremont et al. “Atmospheric Pressure Ion Focusing in a High-Field Asymmetric Waveform Ion Mobility Spectrometer”, Review of Scientific Instruments, 1999, vol. 70, No. 2, p. 1370-1383.

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