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| Titel |
Catalytic oxidation of H2 on platinum: a robust method for generating low mixing ratio H2O standards |
| VerfasserIn |
A. W. Rollins, T. D. Thornberry, R.-S. Gao, B. D. Hall, D. W. Fahey |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 4, no. 10 ; Nr. 4, no. 10 (2011-10-04), S.2059-2064 |
| Datensatznummer |
250002107
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| Publikation (Nr.) |
 copernicus.org/amt-4-2059-2011.pdf |
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| Zusammenfassung |
| Standard reference samples of water vapor suitable for in situ calibration of
atmospheric hygrometers are not currently widespread, leading to difficulties
in unifying the calibrations of these hygrometers and potentially
contributing to observed measurement discrepancies. We describe and evaluate
a system for reliably and quantitatively converting mixtures of H2
in air to H2O on a heated platinum surface, providing a compact,
portable, adjustable source of water vapor. The technique is shown to be
accurate and can be used to easily and reliably produce a wide range of water
vapor concentrations (≈1 ppm −2%) on demand. The result is a
H2O standard that is expected to be suitable for in situ calibration
of aircraft hygrometers, with an accuracy nearly that of the available
H2 standards (≈±2%). |
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