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Mass Spectrometer

  • US 20100108879A1
  • Filed: 11/15/2007
  • Published: 05/06/2010
  • Est. Priority Date: 11/15/2006
  • Status: Active Grant
First Claim
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1. A mass spectrometer comprising:

  • a first mass to charge ratio filter or mass to charge ratio mass analyser arranged and adapted in a first mode of operation to transmit parent or precursor ions having a mass to charge ratio within a first range;

    an ion mobility spectrometer or separator;

    attenuation means, comprising an ion gate, ion deflector or ion barrier, for attenuating or diverting ions in a mode of operation;

    a collision, fragmentation or reaction device; and

    a control device arranged and adapted to control the operation of said attenuation means so that ions having mass to charge ratios within said first range but having one or more undesired first charge states are substantially attenuated.

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