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METHOD FOR STORING AND REACTING IONS IN A MASS SPECTROMETER

  • US 20080014656A1
  • Filed: 06/27/2007
  • Published: 01/17/2008
  • Est. Priority Date: 06/30/2006
  • Status: Active Grant
First Claim
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1. A method of analyzing ions with a mass spectrometer, the method comprising:

  • a. providing a first ion guide having a first end and a second end;

    b. introducing a first group of ions and a second group of ions into the first ion guide, the second group of ions being opposite in polarity to the first group of ions;

    c. applying an RF voltage potential to the first ion guide for confining the first group of ions and the second group of ions radially within the first ion guide;

    d. providing a trapping barrier to the second end of the first ion guide for trapping the first group of ions within the first ion guide;

    e. providing an axial field for pushing the first group of ions toward the trapping barrier.

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