Mass spectrometer and mass spectrometric analysis method

Details Mass spectrometer and mass spectrometric analysis method Mass spectrometer and mass spectrometric analysis method

2011-06-07

2011-06-07

Kim, Robert (Department: 2881)

Radiant energy

Ionic separation or analysis

Methods

C250S281000, C250S283000, C250S287000, C250S288000, C250S290000, C250S291000, C250S292000, C250S299000

Reexamination Certificate

active

07956322

ABSTRACT:
An MS/MS spectrometric analysis method obtains throughput and mass resolving power of precursor ions. In a mass spectrometer, ions, which are introduced and accumulated in an ion trap unit, are resonance-extracted mass-selectively. A profile of precursor ions at the m/z axis of the ion trap and a profile at the mass analyzer portion, which performs mass analysis of the ions extracted from a collision induced dissociation portion, is obtained by performing a measurement when the injection energy to the collision induced dissociation portion is low, and when the injection energy to the collision induced dissociation portion is high. The profile at the m/z axis of the ion trap of the obtained two-dimensional spectrum is substituted with the profile at the m/z axis of the mass analyzer portion. In this way, the m/z of both the precursor ions and the fragment ions can be determined with high mass resolving power.

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