Online gas chromatograph operation with reduced usage of calibration gas
US9746450B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2014 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Oct 31, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/8886
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An online gas chromatograph is provided. The online gas chromatograph includes a sample inlet and at least one chromatographic column operably coupled to the sample inlet. At least one valve is interposed between the sample inlet and the at least one chromatographic column. A detector is fluidically coupled to the at least one chromatographic column. A controller is coupled to the detector and to the at least one valve, the controller is configured to control flow from the sample inlet through the chromatograph using the at least one valve. The controller is configured to generate a plurality of sequential calibration cycles, where each calibration cycle has a calibration gas purge operation. The first calibration gas purge operation lasts longer than the second calibration gas purge operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.