Ion trap mass spectrometer, mass spectrometry method and non-transitory computer readable medium storing control program
AssigneeShimadzu Corporation
InventorsShinichi Iwamoto, Sadanori Sekiya
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Abstract
An ion trap mass spectrometer includes an ion trap including a first electrode and a second electrode different from the first electrode, a first voltage controller that periodically switches a DV voltage among DC voltages having a plurality of values and apply the DV voltages to the first electrode, and a second voltage controller that applies a sine-wave voltage to the second electrode when ions captured in the ion trap are dissociated.
Claims7
An ion trap mass spectrometer comprising:
- an ion trap including a first electrode and a second electrode different from the first electrode;
- a first voltage controller that periodically switches a DC voltage among DC voltages having a plurality of different values and apply the DC voltages to the first electrode;
- and
- a second voltage controller that applies a sine-wave voltage to the second electrode when ions captured in the ion trap are dissociated,
- wherein the first voltage controller captures the ions in the ion trap by applying a square-wave voltage to the first electrode.
A mass spectrometry method with which an ion trap mass spectrometer including an ion trap, including a first electrode and a second electrode different from the first electrode, is used, including:
- periodically switching a DC voltage among DC voltages having a plurality of different values and applying the DV voltages to the first electrode;
- applying a sine-wave voltage to the second electrode when ions captured in the ion trap are dissociated;
- and
- capturing the ions in the ion trap by applying a square-wave voltage to the first electrode.
An ion trap mass spectrometer comprising:
- an ion trap including a first electrode and a second electrode different from the first electrode;
- a first voltage controller that periodically switches a DC voltage among DC voltages having a plurality of different values and apply the DC voltages to the first electrode;
- and
- a second voltage controller that applies a sine-wave voltage to the second electrode when ions captured in the ion trap are dissociated,
- wherein a frequency of the sine-wave voltage is a frequency based on a secular frequency of the ions.
A non-transitory computer readable medium storing a control program for causing a processing device to execute a process of controlling an ion trap mass spectrometer including an ion trap including a first electrode and a second electrode different from the first electrode,
- the process including:
- a first voltage control process of periodically switching a DC voltage among DC voltages having a plurality of different values and applying the DC voltages to the first electrode;
- a second voltage control process of applying a sine-wave voltage to the second electrode when ions captured in the ion trap are dissociated;
- and
- capturing the ions in the ion trap by applying a square-wave voltage to the first electrode, and
- the control program causing a computer to execute the process.
Dependencies are inferred from the claim text.