Mass spectrometer device and method using scanned phase applied potentials in ion guidance
US8586917B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2013 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Jun 3, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ion guide or mass analyzer is disclosed comprising a plurality of electrodes having apertures through which ions are transmitted in use. A pseudo-potential barrier is created at the exit of the ion guide or mass analyzer. The amplitude or depth of the pseudo-potential barrier is inversely proportional to the mass to charge ratio of an ion. One or more transient DC voltages are applied to the electrodes of the ion guide or mass analyzer in order to urge ions along the length of the ion guides or mass analyzer. The amplitude of the transient DC voltage applied to the electrode may be increased with time so that ions are caused to be emitted from the ion guide or mass analyzer in reverse order of their mass to charge ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.