System for integrated backflush in a gas chromatograph
US8210026B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2008 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Nov 18, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/62
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A detector in a gas chromatograph includes a detector inlet configured to receive a chromatographic column, the chromatographic column having a column entrance and a column exit, the column exit coupled to the detector inlet, a restriction integrated within the detector, the restriction located to receive an output of the chromatographic column, at least one pressure regulated gas source provided for normal gas chromatograph operation and arranged to provide at least one gas to a location between the integrated restriction and the column exit, and a backflush controller coupled to the pressure regulated gas source, the backflush controller configured to control a pressure differential between the column exit and the column entrance such that the at least one gas backflushes the chromatographic column when a pressure at the column exit exceeds a pressure at the column entrance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.