Concept
GV Instruments Trace Gas Preconcentrator
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL0559/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | GV Gas Preconcentrator | ||
| Definition | A gas chromatograph used for the isotope characterisation of N2O, CO2 and CH4. Gas samples can be injected either manually, using dual-ended sample bottles with valves, or using the fully automated inlet system. Manual selection of the gas to be analysed (CH4, CO2 or N2O) dictates the route the sample will travel through the instrument. For CO2 and N2O analysis, a sample is diverted by a helium gas via the gas selector valves, through a sequence of chemical traps which purify the sample. The sample is then cryogenically frozen twice to concentrate the trace gas. The sample is then separated using the poraplot-Q gas chromatograph (GC) column, ready for analysis. During CH4 analysis, the sample is transported through additional stages including, the oxidation of CO to CO2 by a Sofnocat catalyst, combustion in the furnace and an additional cryogenic trap is used. The instrument is designed to be coupled with the IsoPrime stable isotope ratio mass spectrometer (IRMS). The Trace Gas preconcentrator was originally manufactured by GV Instruments, but part of the business was sold to Isoprime Ltd (a group member of Elementar Analysensysteme GmbH) in 2008, who now manufacturer the Trace Gas preconcentrator. | ||
| Date | 2012-10-04T12:03:09 | ||
| Identifier | SDN:L22::TOOL0559 | ||
| Note | accepted | ||
| Has Current Version | 1 | ||
| version | 1 | ||
| inScheme | http://vocab.nerc.ac.uk/scheme/SDNDEV/current/ | ||
| Broader | L05:LAB02 |
gas chromatographs | Mapping: 473062 |
| Related | B75:ORG00650 |
Isoprime Ltd | Mapping: 1448509 |
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