Quadrupole mass spectrometer with spatial dispersion

Details Quadrupole mass spectrometer with spatial dispersion Quadrupole mass spectrometer with spatial dispersion

2007-03-27

2007-03-27

Nguyen, Kiet T. (Department: 2881)

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

C250S281000, C250S282000

Reexamination Certificate

active

10643092

ABSTRACT:
A mass analyzer for use in a mass spectrometry system comprises an elongate rod set. The rod set has first and second ends and an inscribed circle within the rod set. The radius of the rod set varies from one end of the rod set to the other, so that ions of different mass to charge ratios will become unstable at different locations along the rod set. This characteristic can then be used to cause ejection of ions at different locations along the rod set, in a mass dependent manner. Detectors placed linearly along the rod set can then be used to detect ions and determine the mass of the ions from their ejection locations.

REFERENCES:
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patent: 5576540 (1996-11-01), Jolliffe
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patent: 6093929 (2000-07-01), Javahery et al.
patent: 6744043 (2004-06-01), Loboda
patent: WO 97 07530 (1997-02-01), None
Internatioanl Search Report—Application No. PCT/CA03/01247 filed Aug. 19, 2003.

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