Tunable diode laser measurement of nitrous oxide in air

Details Tunable diode laser measurement of nitrous oxide in air Tunable diode laser measurement of nitrous oxide in air

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7.1093c&link_type=abstract

Geophysical Research Letters, vol. 7, Dec. 1980, p. 1093-1096. Research supported by the Chemical Manufacturers Association.

Physics

8

Atmospheric Composition, Molecular Spectroscopy, Nitrous Oxides, Troposphere, Tunable Lasers, Air Sampling, Error Analysis, Laser Spectroscopy, Standard Deviation

Scientific paper

Infrared derivative spectroscopy using a tunable diode laser coupled to a multipass absorption cell has been used to measure the nitrous oxide mole fraction in tropospheric air samples. The individual measurement precision was 1.5% (1 standard deviation). No temporal variation outside the statistical error limits was observed in 26 measurements over a two month period. Absolute values were obtained by comparison to manometrically calibrated standards prepared by static dilutions of N2O in air to ambient levels. The mean mole fraction of N2O in dry air was determined to be 298 + or - 5 ppb where the error includes an estimate of possible systematic errors in standard preparation.

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