FAIMS having a displaceable electrode for on/off operation
US8692190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2012 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Mar 23, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/624
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for analyzing ions comprises: an ion source; a FAIMS cell comprising: (a) a gas inlet; (b) an outer electrode having a generally concave inner surface and comprising: (i) an ion inlet operable to receive the ions from the ion source and a carrier gas from the gas inlet; and (ii) an ion outlet; and (c) an inner electrode having a conduit therethrough and having a generally convex outer surface disposed in a spaced-apart and facing arrangement relative to the inner surface of the outer electrode defining at least one annular on separation region therebetween; and a mass analyzer for mass analyzing ions transmitted by the FAIMS cell through the ion outlet, wherein the inner electrode is moveable between a first position and a second position, the first and second positions facilitating movement of the ions through the at least one annular ion separation region and the conduit, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.