Smiths Detection-Watford Limited

Bruce Alec Colin Grant

Oliver Kirkby

Jonathan R Atkinson

Alastair Clark

Robert Brian Turner

An ion mobility spectrometer or other ion apparatus has two or three grid electrodesandtoand' and&#x2032; 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&#x2032; to facilitate discrimination between ions that would otherwise produce a similar output.

Growing community of inventors

London, United Kingdom

Bruce Alec Colin Grant