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    • 32. 发明专利
    • MASS SPECTROMETER
    • CA2628924C
    • 2017-09-05
    • CA2628924
    • 2006-11-23
    • MICROMASS LTD
    • BATEMAN ROBERT HAROLD
    • H01J49/42
    • A method of mass spectrometry is disclosed wherein an Electron Capture Dissociation, Electron Transfer Dissociation or Surface Induced Dissociation fragmentation device is repeatedly switched between a high fragmentation or reaction mode and a low fragmentation or reaction mode. Parent ions from a first sample are passed through the device and parent ion mass spectra and fragmentation ion mass spectra are obtained. Parent ions from a second sample are then passed through the device and a second set of parent ion mass spectra and fragmentation ion mass spectra are obtained. The mass spectra are then compared and if either certain parent ions or certain fragmentation ions in the two samples are expressed differently then further analysis is performed to seek to identify the ions which are expressed differently in the two different samples.
    • 40. 发明专利
    • MASS SPECTROMETER
    • CA2628926C
    • 2013-01-08
    • CA2628926
    • 2006-11-23
    • MICROMASS LTD
    • BATEMAN ROBERT HAROLD
    • H01J49/42
    • A method is disclosed of identifying parent ions by matching daughter ions found to be produced at substantially the same time that the parent ions elute from a mixture. Ions emitted from an ion source (1) are transmitted to a fragmentation device (4) comprising an Electron Capture Dissociation, an Electron Transfer Dissociation or a Surface Induced Dissociation fragmentation device. The fragmentation device (4) is alternately and repeatedly switched between a first mode wherein the ions are substantially fragmented to produce daughter ions and a second mode wherein the ions are not substantially fragmented. Mass spectra are taken in both modes. At the end of an experimental run parent and daughter ions are recognised by comparing the mass spectra obtained in the two different modes. Daughter ions are matched to particular parent ions on the basis of the closeness of fit of their elution times, and this enables parent ions then to be identified.