Mass spectrometer
US6075244A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1998 |
| Grant date | Jun 13, 2000 |
| Priority date | — |
| Expiry date | Jan 5, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/4215
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of performing a high sensitivity mass analysis is described wherein a plurality of linear quadrupole radio frequency electrodes are aligned, and operated as a mass filter or an ion trap mass analyzer. A background ion removal filter having a linear quadrupole electrode structure may also be connected in cascade to this mass analyzer if necessary. The background ion removal filter powerfully removes background ions so as to improve analytical sensitivity. This mass spectrometer also makes it possible to prevent losses of minute amounts of sample ions in the ion trap, prevent destruction of minute amounts of ions and reduce contamination of the ion trap electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.