| 摘要 |
A mass spectrometer is disclosed comprising a FAIMS device comprising two parallel electrodes 9a,9b in series with an ion mobility separator 12 forming part of a mass spectrometer. Ions are separated in the FAIMS device 9a,9b according to their rate of change of ion mobility with electric field strength. The ions which are onwardly transmitted from the FAIMS device 9a,9b are then passed to an ion separator device 12 comprising a plurality of electrodes 17 and an optional ion trapping region 33. Ions are radially confined with the ion separator by application of an AC or RF voltage to the electrodes 17 and ions are separated according to their ion mobility by applying an axial DC voltage gradient which may remain constant as a function of time or which may vary with time.
|
