Mass spectrometer
US6838662B2 · kind B2 · utility
22Cited by
2References
123Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2003 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Oct 28, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/4235
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mass spectrometer is disclosed comprising a mass filter for separating ions according to their mass to charge ratio. The mass filter comprises a plurality of electrodes wherein ions are radially confined within the mass filter by the application of AC or RF voltages to the electrodes. One or more transient DC voltages or one or more transient DC voltage waveforms are progressively applied to the electrodes so that ions having a certain mass to charge ratio are separated from other ions having different mass to charge ratios which remain radially confined within the mass filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.