Isolating ions in quadrupole ion traps for mass spectrometry

Details Isolating ions in quadrupole ion traps for mass spectrometry Isolating ions in quadrupole ion traps for mass spectrometry

2011-04-19

2011-04-19

Kim, Robert (Department: 2881)

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

C250S282000

Reexamination Certificate

active

07928373

ABSTRACT:
Ions in a predefined narrow mass to charge ratio range are isolated in an ion trap by adjusting the field and using ejection frequency waveform(s). The ejection waveforms have frequency components in a first and a second dimension, and, are applied across electrodes aligned along a first and a second dimension. Thus the mass-to-charge ratio isolation window is controlled and has an improved resolution without increasing the number of frequency components.

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patent: WO 03/041107 (2003-05-01), None

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