Mass Spectrometer
AssigneeMicromass UK Limited
InventorsRobert Harold Bateman, Kevin Giles, Steven Derek Pringle, Jason Lee Wildgoose
Life of this patent
Estimating the term…
Abstract
A closed-loop ion guide (1) is disclosed comprising a plurality of electrodes having apertures through which ions are transmitted in use. Ions are injected into the closed-loop ion guide (1) and may make several circuits of the closed-loop ion guide (1) before being ejected from the ion guide (1). In a mode of operation the ion guide (1) may be arranged to separate ions temporally according to their ion mobility.
Claims25
A mass spectrometer comprising a closed-loop ion guide comprising:
- a plurality of electrodes, and
- means for applying an AC or RF voltage to the plurality of electrodes, said AC or RF voltage generating a pseudo-potential well which acts to confine ions radially within said closed-loop ion guide.
3-7. (canceled)
9-35. (canceled)
37-45. (canceled)
(canceled)
50-54. (canceled)
56-57. (canceled)
59-62. (canceled)
65-66. (canceled)
68-81. (canceled)
A method of mass spectrometry comprising:
- guiding ions through a closed-loop ion guide comprising a plurality of electrodes;
- and
- applying an AC or RF voltage to the plurality of electrodes to generate a pseudo-potential well which acts to confine ions radially within said closed-loop ion guide.
A mass spectrometer comprising a closed-loop ion guide comprising a mass filter and a collision, fragmentation or reaction device wherein in a mode of operation fragment or daughter ions produced in said collision, fragmentation or reaction device pass via said closed-loop ion guide to said mass filter.
A method of mass spectrometry comprising:
- providing a closed-loop ion guide comprising a mass filter and a collision, fragmentation or reaction device;
- and
- passing fragment or daughter ions produced in said collision, fragmentation or reaction device via said closed-loop ion guide to said mass filter.
85-88. (canceled)
Dependencies are inferred from the claim text.