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AMT | Articles | Volume 12, issue 5
Atmos. Meas. Tech., 12, 2631–2646, 2019
https://doi.org/10.5194/amt-12-2631-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: The 10th International Carbon Dioxide Conference (ICDC10)...

Atmos. Meas. Tech., 12, 2631–2646, 2019
https://doi.org/10.5194/amt-12-2631-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 07 May 2019

Research article | 07 May 2019

Preparation of primary standard mixtures for atmospheric oxygen measurements with less than 1 µmol mol−1 uncertainty for oxygen molar fractions

Nobuyuki Aoki et al.

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Cited articles

Aoki, N. and Shimosaka, T.: Development of an analytical system based on a paramagnetic oxygen analyzer for atmospheric oxygen variations, Anal. Sci., 34, 487–493, 2018. 
Alink, A. and Van der Veen, A. M.: Uncertainty calculations for the preparation of primary gas mixtures, Metrologia, 37, 641–650, 2000. 
Baertschi, P.: Absolute 18O content of standard mean ocean water, Earth Planet. Sc. Lett., 31, 341–344, 1976. 
Barkan, E. and Luz, B.: High precision measurements of 17O/16O and 18O∕16O ratios in H2O, Rapid Commun. Mass Sp., 19, 3737–3742, 2005. 
Battle, M., Bender, M. L., Tans, P. P., White, J. W. C., Ellis, J. T., Conway, T., and Francey, R. J.: Global carbon sinks and their variability inferred from atmospheric O2 and 13C, Science, 287, 2467–2470, 2000. 
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Short summary
Observation of atmospheric O2 requires highly precise standard gas mixtures with uncertainty of less than 1 ppm for the O2 mole fraction or 5 per meg for O2 / N2. The uncertainty had not been achieved due unknown uncertainty factors in mass determination of the filled source gases. We first developed the primary standard mixtures with 1 ppm for the O2 mole fraction or 5 per meg by identifying and reducing the unknown uncertainty factors.
Observation of atmospheric O2 requires highly precise standard gas mixtures with uncertainty of...
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