Ion mobility spectrometer comprising two drift chambers

Details Ion mobility spectrometer comprising two drift chambers Ion mobility spectrometer comprising two drift chambers

2011-08-09

2011-08-09

Kim, Robert (Department: 2881)

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

C250S281000, C250S282000, C250S290000

Reexamination Certificate

active

07994475

ABSTRACT:
An ion mobility spectrometer has two drift chambers and a common, doped reaction region. Each drift chamber includes an ion modifier, such as one that fragments the doped ions by a high electrical field. One of the drift chambers is doped and the other is undoped. In this way, the dopant adducts are removed by the modification process but then recombine with dopant only in the doped chamber so that different outputs are produced by the two drift chambers.

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