Guard columns for gas chromatographs and gas chromatograph-mass spectrometers
US7520920B1 · kind B1 · utility
2Cited by
15References
51Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2006 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | Oct 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses a gas chromatograph assembly. In one implementation, the assembly includes a sample injector and a guard column assembly. The guard column assembly includes a guard column connected to and downstream of the sample injector; a jacket with low thermal mass surrounding the guard column; a temperature controlled heater connected to the jacket to control the temperature of the jacket and thereby the temperature of the guard column; and an insulating housing surrounding the jacket. An analytical column is connected to and downstream of the guard column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.