Ion trap analyzer and ion trap mass spectrometry analysis method
US9502228B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2013 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Mar 26, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/4245
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ion trap analyzer, an ion trap mass spectrometry analysis method, and an ion fragmentation method are provided. The ion trap analyzer includes an ion trapping space enclosed by multiple electrodes (101, 102, 103, 11, 12, 214), where a high-frequency voltage is applied on at least a part of the electrodes, so as to generate, within the trapping space, a trapping electric field dominated by a quadratic field. The apparatus is provided with an ion ejection outlet (200) in at least one direction away from the center of the trap; an alternating voltage signal used for resonant excitation of ion motions is overlaid on an electrode part that is on a side of the ion ejection outlet and closest to the ejection outlet, while no voltage signal that is identical in range and phase with the alternating voltage is applied on at least one remaining electrode part in said direction. With the method, or by further applying, to the remaining electrode part in said direction, a voltage signal that is inverted to the alternating voltage, the orientation of an alternating electric field induced by the excitation alternating voltage signal can be limited, thereby improving the resonance ejection effi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.