Mass spectrometer with radial ejection

Details Mass spectrometer with radial ejection Mass spectrometer with radial ejection

1995-08-11

1996-11-19

Berman, Jack I.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250282, 250283, H01J 4942

Patent

active

055765408

ABSTRACT:
A mass analyzer having a set of rods, e.g. quadrupole rods, into which ions are injected axially and are then contained by the combination of collision gas in the volume between the rods and end lenses which prevent the ions from leaving the volume between the rods. After the ions have been contained and manipulated, they are ejected radially through an opening or slot in one of the rods for detection. The configuration provides many of the advantages of a conventional ion trap, e.g. greater sensitivity, while avoiding a number of disadvantages of a conventional trap. If desired ions can be dissociated by applying an axial oscillating field, before being radially ejected.

REFERENCES:
patent: Re34000 (1992-07-01), Syka et al.
patent: 3629573 (1971-12-01), Carrico et al.
patent: 3925662 (1975-12-01), Dawson
patent: 4540884 (1985-09-01), Stafford et al.
patent: 5420425 (1995-05-01), Bier et al.

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