Mass spectrometer

Details Mass spectrometer Mass spectrometer

2005-01-04

2005-01-04

Wells, Nikita (Department: 2881)

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

C250S281000, C250S282000, C250S283000, C250S287000, C250S288000

Reexamination Certificate

active

06838662

ABSTRACT:
A mass spectrometer is disclosed comprising a mass filter for separating ions according to their mass to charge ratio. The mass filter comprises a plurality of electrodes wherein ions are radially confined within the mass filter by the application of AC or RF voltages to the electrodes. One or more transient DC voltages or one or more transient DC voltage waveforms are progressively applied to the electrodes so that ions having a certain mass to charge ratio are separated from other ions having different mass to charge ratios which remain radially confined within the mass filter.

REFERENCES:
patent: 5140158 (1992-08-01), Post
patent: 20040031920 (2004-02-01), Giles et al.
patent: 2 392 006 (2004-02-01), None
patent: 2 392 306 (2004-02-01), None
patent: 2 392 548 (2004-03-01), None
patent: WO 9401883 (1994-01-01), None
Schwager et al., “The Solitron—A New Spectrometer That Uses the Mass Selectivity of a Solitary, Traveling Electric Potential Hill”, 42ndASMS Conference on Mass Spectrometry, pp. 512, 1994.

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