Mass spectrometer and method of mass spectrometry
US7820961B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2007 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Aug 29, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/429
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear trap having high ejection efficiency and low ejection energy is realized. In a mass spectrometer in which ions generated by an ion source are introduced to a quadrupole rod structure applied with RF voltage and ejected from the quadrupole rod structure so as to be detected by a detection mechanism, a mass dependent potential is formed in the axial direction of the quadrupole rod structure and ions are ejected mass selectively from the vicinity of a minimum point of the potential, the mass dependent potential being formed by applying electrostatic voltage and RF voltage to an insertion electrode inserted in the quadrupole rods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.