Patent ID: 11887832
Assignee: THERMO FISHER SCIENTIFIC (BREMEN) GMBH
Field: Measurement (Instruments)
Classification: CPC H  G | IPC H

Claim 32:
33. A method of mass spectrometry, comprising the steps of:
(a) generating a beam of ions from a sample;
(b) selecting ions from the beam in accordance with their mass to charge ratio, using a static field mass filter, selecting the ions from the beam including:
injecting ions into the static field mass filter, through an entrance aperture thereof,
deflecting ions away from a longitudinal symmetry axis of the static field mass filter using a first Wien filter, so as to separate ions in a direction orthogonal to the longitudinal symmetry axis, in accordance with their m/z,
deflecting ions downstream of the first Wien filter back towards the longitudinal symmetry axis, using an inversion lens, and
focusing ions towards an exit aperture of the static field mass filter using a second Wien filter;

(c) spatially separating the ions received from the static field mass filter in a sector field analyser, based upon their mass to charge ratio; and
(d) detecting a plurality of different ion species from the separated ions in a multicollector.