Mass spectrometer with radial ejection
US5576540A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1995 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Aug 11, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/0095
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mass analyzer having a set of rods, e.g. quadrupole rods, into which ions are injected axially and are then contained by the combination of collision gas in the volume between the rods and end lenses which prevent the ions from leaving the volume between the rods. After the ions have been contained and manipulated, they are ejected radially through an opening or slot in one of the rods for detection. The configuration provides many of the advantages of a conventional ion trap, e.g. greater sensitivity, while avoiding a number of disadvantages of a conventional trap. If desired ions can be dissociated by applying an axial oscillating field, before being radially ejected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.