Method of mass analyzing a sample by use of a quistor

Details Method of mass analyzing a sample by use of a quistor Method of mass analyzing a sample by use of a quistor

1988-10-31

1989-11-21

Berman, Jack I.

Radiant energy

Ionic separation or analysis

Methods

250290, 250291, 250292, H01J 4942

Patent

active

048824844

ABSTRACT:
In a quadrupole ion store (QUISTOR), a sample is analyzed by increasing the mplitude of the harmonic, or "secular", oscillations of selected stably trapped ions so that they leave the trapping field. In a preferred embodiment, deviations from the ideal electrode geometry are incorporated into the QUISTOR to produce resonance phenomena between the r and z secular oscillations, thereby increasing the amplitude of oscillations in the z direction.

REFERENCES:
patent: 4540884 (1985-09-01), Stafford et al.
patent: 4749860 (1988-06-01), Kelley et al.

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