Radiant energy – Ionic separation or analysis – Cyclically varying ion selecting field means
Reexamination Certificate
2006-01-24
2006-01-24
Nguyen, Kiet T. (Department: 2881)
Radiant energy
Ionic separation or analysis
Cyclically varying ion selecting field means
Reexamination Certificate
active
06989534
ABSTRACT:
The invention relates to methods and devices for the effective capturing of externally generated ions in an RF operated quadrupole ion trap. The invention involves applying a voltage consisting of positive and negative pulses, instead of a sinusoidal RF voltage, during the capturing process, with capturing intervals between each pulse in which the voltage is low.
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Hager, James W., et al., “A new linear ion trap mass spectrometer”, Rapid Communications In Mass Spectrometer, vol. 16, John Wiley & Sons, Ltd., 2002, pp. 512-526.
Franzen Jochen
Schubert Michael
Bruker Daltonik GmbH
Nguyen Kiet T.
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