Ion selection apparatus and method

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United States of America Patent

PATENT NO 8610057
APP PUB NO 20110260053A1
SERIAL NO

13177526

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Abstract

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An ion mobility spectrometer or other ion apparatus has two or three grid electrodes 51 and 52; 151 to 153; 106 and 107; 106′ and 107′ extending laterally of the ion flowpath. An asymmetric waveform with a dc compensating voltage is applied between the electrodes to produce a field parallel to the ion flow path that affects ions differently according to their field-dependent mobility. This filters or delays different ions selectively in their passage to an ion detector 11, 111, 111′ to facilitate discrimination between ions that would otherwise produce a similar output.

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Patent Owner(s)

Patent OwnerAddress
SMITH DETECTION-WATFORD LIMITED64 CLARENDON ROAD WATFORD HERTS WD17 1DA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Atkinson, Jonathan Richard Watford, GB 15 120
Clark, Alastair Watford, GB 32 223
Grant, Bruce Alec Colin London, GB 3 11
Turner, Robert Brian Chesham, GB 12 240

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