Abstract
The Trace Gas Analyser (TGA) uses photo-acoustic infra-red spectroscopy to measure the N2O concentration in a gas sample. In association with soil enclosures, this fully portable device allows in-field N2O flux measurements. The accuracy of photo-acoustic infra-red spectroscopy (PAIRS) for N2O analysis was tested by comparing PAIRS analysis with GC analysis of both standard N2O gases and of head-space samples taken from soil enclosures. In addition, the CO2 interference on N2O analysis by PAIRS was investigated by analysing N2O/CO2 gas mixtures. Photo-acoustic infra-red spectroscopy accurately measured the N2O concentration of standard gases. The CO2 interference on N2O analysis by PAIRS was linear and the average CO2 correction factor was 4.2 × 10-4. There was some discrepancy between flux measurements using GC and PAIRS, which might be due to cross contamination between the soil enclosures.
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Abbreviations
- PAIRS:
-
photo acoustic infra-red spectroscopy
- TGA:
-
Trace Gas Analyser
References
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© 1996 Springer Science+Business Media Dordrecht
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De Klein, C.A.M., Harrison, R., Lord, E.I. (1996). Comparison of N2O Flux Measurements Using Gas Chromatography and Photo-Acoustic Infra-Red Spectroscopy. In: Van Cleemput, O., Hofman, G., Vermoesen, A. (eds) Progress in Nitrogen Cycling Studies. Developments in Plant and Soil Sciences, vol 68. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5450-5_87
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DOI: https://doi.org/10.1007/978-94-011-5450-5_87
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