Quadrupole ion trap mass spectrometer having two axial modulatio

Details Quadrupole ion trap mass spectrometer having two axial modulatio Quadrupole ion trap mass spectrometer having two axial modulatio

1991-01-25

1992-12-15

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

250282, B01D 5944, H01J 4940

Patent

active

051719916

ABSTRACT:
Disclosed is quadrupole ion trap mass spectrometer of the type including a ring electrode and end caps defining a trap volume and including means for introducing sample ion into the ion trap and means for applying voltages to the electrodes. Further included are means for applying two resonant excitation waveforms at two different frequencies and two different voltages between the end cap electrodes to simultaneously excite multiple ions in the ion trap volume.

REFERENCES:
patent: 4650999 (1987-03-01), Fies et al.
patent: 4882484 (1989-11-01), Franzen et al.
patent: 4959543 (1990-09-01), McIver et al.

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