Collision cell for an MS/MS mass spectrometer
US8148675B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2007 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Dec 6, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The length of the collision cell (20) in the direction along the ion optical axis (C) is set to be within the range between 40 and 80 mm, and typically 51 mm, which is remarkably shorter than before. The CID gas is supplied so that it flows in the direction opposite to the ion's traveling direction. Since the energy that an ion receives in colliding with a CID gas increases, it is possible to practically and sufficiently ensure the CID efficiency even though the collision cell (20) is short. In addition, since the passage distance for an ion is short, the passage time is shortened. Accordingly, it is possible to avoid the degradation in the detection sensitivity and the generation of a ghost peak due to the delay of the ion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.