Quadrupole ion trap device and methods of operating a quadrupole ion trap device
US7285773B2 · kind B2 · utility
10Cited by
8References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2002 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | May 7, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A quadrupole ion trap device has a field adjusting electrode located outside the trapping region adjacent the aperture in the entrance end cap electrode, and optionally adjacent the aperture in the exit end cap electrode. The field adjusting electrode(s) controls field distortion in the vicinity of the apertures. By appropriately setting the voltages on the field adjusting electrodes the efficiency and resolution of operational processes such as ion introduction, precursor ion isolation and mass scanning can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.