Quadrupole mass spectrometer with ION traps to enhance sensitivity
US6504148B1 · kind B1 · utility
89Cited by
5References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 1999 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | May 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/4225
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mass spectrometer method and apparatus has a mass analyzer and a collision cell. The collision cell is configured to trap ions. Precursor ions are selected in the first mass analyzer and then subject to collision-induced dissociation in the collision cell. The fragment ions are then scanned out axially by application of suitable excitation to the ions. The fragment ions can then be detected by a time of flight (TOF) mass spectrometer. For a TOF spectrometer, trapping fragment ions in the collision cell and scanning them out can give enhanced sensitivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.