Ion selection apparatus and method

Details Ion selection apparatus and method Ion selection apparatus and method

2011-07-12

2011-07-12

Berman, Jack I (Department: 2881)

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

Reexamination Certificate

active

07977627

ABSTRACT:
An ion mobility spectrometer or other ion apparatus has two or three grid electrodes51and52; 151to153; 106and107; 106′ and107′ 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 detector11, 111, 111′ to facilitate discrimination between ions that would otherwise produce a similar output.

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International Search Report dated Mar. 19, 2007 from corresponding International Application PCT/GB2007/000021 (3 pgs.).

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