Gas chromatographic apparatus
US4470832A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1983 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Mar 9, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/628
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas chromatographic apparatus having at least two gas separation columns arranged in parallel to each other, the outlet of the first gas separation column being connected to a gas sensor through a column switch valve, and the outlet of the second gas separation column being connected to the column switch valve through a gas detection time-controlling pipe, where when the first gas separation column is communicated with the gas sensor, the outlet of the second gas separation column is made open to the atmosphere by the column switch valve, or when the second gas separation column is communicated with the gas sensor, the outlet of the first gas separation column is made open to the atmosphere by the column switch valve, or the apparatus having a first gas separation column whose inlet is connected to the switch valve and at least two second columns whose inlets are connected to the outlet of the first gas separation column, whose outlets are connected to the gas sensor and which are arranged in parallel to each other through the column switch valve, where the first gas separation column, one of the second columns and the column switch valve are communicated with each other, by the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.