Pressure stabilized ion mobility spectrometer

Details Pressure stabilized ion mobility spectrometer Pressure stabilized ion mobility spectrometer

1995-06-07

1996-09-03

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

250289, B01D 5944, H01J 4940

Patent

active

055526004

ABSTRACT:
The gas pressure in an ion mobility spectrometer is controlled to maintain near-constant pressure in the drift region by adjusting gas flows in response to a pressure transducer output. The pressure in the system may be referenced to ambient pressure. The increase in pressure stability achieved permits the expected drift times of target analytes to be determined much more accurately than otherwise, and thereby allows more specific detection parameters to be used. This in turn results in a significantly improved false alarm rate for the device.

REFERENCES:
patent: 2714164 (1955-07-01), Riggle et al.
patent: 4777363 (1988-10-01), Eiceman et al.
patent: 5237175 (1993-08-01), Wells
patent: 5268572 (1993-12-01), Mordehai et al.

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