An international intercomparison of stable carbon isotope composition measurements of dissolved inorganic carbon in seawater.
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McKay, J. L.
Dubinina, E. O.
Mørkved, P. T.
Theiling, B. P.
van Geldern, R.
Wallace, D. W. R.
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We report results of an intercomparison of stable carbon isotope ratio measurements in seawater dissolved inorganic carbon (δ13C-DIC) which involved 16 participating laboratories from various parts of the world. The intercomparison involved distribution of samples of a Certified Reference Material for seawater DIC concentration and alkalinity and a preserved sample of deep seawater collected at 4000 m in the northeastern Atlantic Ocean. The between-lab standard deviation of reported uncorrected values measured with diverse analytical, detection, and calibration methods was 0.11‰(1σ). The multi-lab average δ13C-DIC value reported for the deep seawater sample was consistent within 0.1‰ with historical measured values for the same water mass. Application of a correction procedure based on a consensus value for the distributed reference material, improved the between-lab standard deviation to 0.06‰. Themagnitude of the corrections were similar to those used to correct independent d.....
JournalLimnology and Oceanography: Methods
Page Rangepp. 200–209
Sustainable Development Goals (SDG)14.a
Essential Ocean Variables (EOV)N/A
CitationCheng, L., Normandeau, C., Bowden, R., Doucett, R., Gallagher, B., Gillikin, D.P., Kumamoto, Y., McKay, J.L., Middlestead, P., Ninnemann, U., Nothaft, D., Dubinina, E.O., Quay, P., Reverdin, G., Shirai, K., Mørkved, P.T., Theiling, B.P., van Geldern, R. and Wallace, D.W.R. (2019) An international intercomparison of stable carbon isotope composition measurements of dissolved inorganic carbon in seawater. Limnology and Oceanography: Methods, 17, pp. 200-209. DOI: https://doi.org/10.1002/lom3.10300
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