Ion trap, mass spectrometer and ion mobility analyzer using the ion trap
First Claim
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1. An ion trap comprising a means for trapping the charged particles at the one-dimensional potential formed by the potential due to a DC voltage and the potential due to an AC voltage.
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Abstract
A mass spectrometer using a one-dimensional ion trap is disclosed. The mass spectrometer having the one-dimensional ion trap can trap a great amount of ions, and the provision of a mass spectrometric analyzer capable of operation in a low vacuum eliminates the need of a high vacuum.
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Citations
21 Claims
- 1. An ion trap comprising a means for trapping the charged particles at the one-dimensional potential formed by the potential due to a DC voltage and the potential due to an AC voltage.
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7. An ion trap comprising:
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an electrode unit including a solid-cylindrical electrode and a hollow-cylindrical electrode sharing the same axis as and surrounding the solid-cylindrical electrode; and power supplies for applying an AC voltage to one of the solid-cylindrical electrode and the hollow-cylindrical electrode and a DC voltage to the other.
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13. A mass spectrometer comprising:
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an ion trap including an electrode unit having a solid-cylindrical electrode and a hollow-cylindrical electrode sharing the axis with and surrounding the solid-cylindrical electrode, power supplies for applying an AC voltage to one of the solid-cylindrical electrode and the hollow-cylindrical electrode and a DC voltage to the other, and a control unit for controlling the voltage applied from the power supplies; and a current detection means for detecting the current of the electrode unit; wherein the mass spectrum of the ions trapped in the electrode unit is acquired by measuring the current on the current detection means while at the same time scanning by changing, through the control unit, the magnitude of the voltage applied from the power supplies. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An ion mobility analyzer comprising:
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an ion trap including an electrode unit having a solid-cylindrical electrode and a hollow-cylindrical electrode sharing the axis with and surrounding the solid-cylindrical electrode, power supplies for applying an AC voltage to one of the solid-cylindrical electrode and the hollow-cylindrical electrode and a DC voltage to the other, and a control unit for controlling the voltage applied from the power supplies; and a current detection means for detecting the current of the electrode unit; wherein the control unit isolates the ions having a specified m/z value, and the current detection means measures the current due to the isolated ions by turning off the voltage applied from the power supplies thereby to measure the mobility of the ions trapped in the electrode unit. - View Dependent Claims (20, 21)
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Specification