Method of switching ports of a switching valve of a gas chromatography-mass spectrometry apparatus
US8592755B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2012 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Sep 11, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/202
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of operating a switching valve of a GC-MS apparatus is provided with installing a sample injector; connecting a first capillary column downstream of the sample injector; installing a heart-cutting unit downstream of the first capillary column; installing a first interconnecting column and a second capillary column to the heart-cutting unit respectively; connecting a switching valve to the heart-cutting unit via a first interconnecting column and a second capillary column respectively wherein the switching valve includes a plurality of ports; connecting the switching valve to an MS via a second interconnecting column; and switching ports to create different sample loops for passing compounds from the heart-cutting unit to the MS or passing compounds from the heart-cutting unit to the discharge column to be purged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.