Ion guide for mass spectrometer
First Claim
1. A mass spectrometer comprising an ion guide and a mass analyzer, the ion guide defining a guide axis and adapted to provide an ion control field comprising a component for restraining movement of ions normal to the guide axis and comprising a component for controlling movement of ions parallel the guide axis;
- the field adapted to provide for sequential release of ions having varying mass-to-charge ratios from the guide according to the mass-to-charge ratios of the ions and along a path parallel to the guide axis;
the sequence adapted to provide for the arrival of ions of substantially all released mass-charge ratios within an extraction region of the mass analyzer disposed substantially along the guide axis at substantially the same time;
the mass analyzer adapted for simultaneous analysis of ions of varying mass-to-charge ratios.
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Accused Products
Abstract
An ion guide 24 for a mass spectrometer 30 including means for ejecting ions of different mass-to-charge ratios from the ion guide towards a detector or other object or device. The ejecting means causes the ions to be ejected in a desired sequence. The ions travel at different rates according to their mass-to-charge ratios, so that they arrive at a desired point in space in a desired sequence, for example in a detector 56 of a mass spectrometer at substantially the same time.
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Citations
16 Claims
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1. A mass spectrometer comprising an ion guide and a mass analyzer,
the ion guide defining a guide axis and adapted to provide an ion control field comprising a component for restraining movement of ions normal to the guide axis and comprising a component for controlling movement of ions parallel the guide axis; -
the field adapted to provide for sequential release of ions having varying mass-to-charge ratios from the guide according to the mass-to-charge ratios of the ions and along a path parallel to the guide axis;
the sequence adapted to provide for the arrival of ions of substantially all released mass-charge ratios within an extraction region of the mass analyzer disposed substantially along the guide axis at substantially the same time;
the mass analyzer adapted for simultaneous analysis of ions of varying mass-to-charge ratios. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of guiding ions differing in mass-to-charge ratios, comprising:
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providing in an ion guide defining a guide axis an ion control field comprising a component for restraining movement of ions normal to the guide axis;
providing in the ion control field an accumulation potential profile for accumulating ions within a constrained space within the ion guide;
providing in the ion control field an ejection potential profile for sequentially ejecting ions of varying mass-to-charge ratios from the guide according to the mass-to-charge ratios of the ions and along a path parallel to the guide axis, such that all of the ejected ions arrive at an extraction region disposed substantially along the guide axis at substantially the same time. - View Dependent Claims (9, 10)
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11. An ion guide for a mass spectrometer, the ion guide defining a guide axis and adapted to generate at least one ion control field for restraining movement of ions normal to the guide axis and for controlling movement of ions parallel the guide axis;
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the field adapted to provide for selective release of ions having varying mass-to-charge ratios from the guide according to a desired sequence of mass-to-charge ratios along a path parallel to the guide axis;
the sequence selectable to provide for the arrival of ions of substantially all released mass-to-charge ratios at a selected extraction region disposed substantially along the guide axis at substantially the same time. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification