Patent ID: 8410424

Claim:
A mass spectrometer, comprising: an ion source for generating ions; a mass selector for receiving ions from the ion source and passing ions within a selected range of mass-to-charge ratios; a controller for causing the mass selector to sequentially pass a first type of ions having a first selected range of mass-to-charge ratios and a second type of ions having a second selected range of mass-to-charge ratios different from the first selected range of mass-to-charge ratios; an ion store for combining and trapping the first and second types of ions or ions derived from the first and second types of ions, and for releasing the combined ions; and a pulsed accurate mass analyzer for receiving the combined ions from the ion store and for measuring the mass-to-charge ratios of the combined ions to produce a mass spectrum of the combined ions; wherein the mass selector is selected from a group consisting of a quadrupole mass filter and an ion trap.