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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Seakins, Paul W. Harrison, David Lewis, Alastair C. |
| Copyright Year | 2000 |
| Abstract | Sub-ambient trapping, used to pre-concentrate atmospheric samples for non-methane hydrocarbon (NMHC) analysis by gas chromatography, can also be used to measure ambient methane concentrations. Above a sample volume of 40 ml, a dynamic equilibrium is established between ambient and trapped methane allowing for simultaneous quantitative determinations of methane and NMHC. The temperature stability of the trap is critical for quantitative methane analysis and this can be achieved by Peltier effect cooling. Simultaneous measurements of methane and NMHC reduce the equipment required for field trips and can ease the interpretation and modelling of atmospheric data. The feasibility for deployment of the system in remote locations was demonstrated by running the apparatus virtually unattended for a 5-day period. The correlations between the concentrations of methane, ethane and ethene measured during this period are discussed. |
| Starting Page | 59 |
| Ending Page | 63 |
| Page Count | 5 |
| File Format | HTM / HTML PDF |
| ISSN | 14640325 |
| Volume Number | 2 |
| Issue Number | 1 |
| Journal | Journal of Environmental Monitoring |
| DOI | 10.1039/a907788j |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | NMHC Peltier Hydrocarbon Gas chromatography Methane Dynamic equilibrium Ethylene |
| Content Type | Text |
| Resource Type | Article |
| Subject | Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law |
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