Wendeberg, M., J. Richter, M. Rothe and W. A. Brand: delta18O anchoring to VPDB: calcite digestion with 18O-adjusted ortho-phosphoric acid. In: Rapid Communications in Mass Spectrometry 25, 851-860 (2011).
localid: BGC1473
Warneke, T., A. K. Petersen, C. Gerbig, A. Jordan, C. Rödenbeck, M. Rothe, R. Macatangay, J. Notholt and O. Schrems: Co-located column and in situ measurements of CO2 in the tropics compared with model simulations. In: Atmospheric Chemistry and Physics 10, 5593-5599 (2010).
localid: BGC1348
Brand, W. A., L. Huang, H. Mukai, A. Chivulescu, J. Richter and M. Rothe: How well do we know VPDB? Variability of delta 13C and delta 18O in CO2 generated from NBS19-calcite. In: Rapid Communications in Mass Spectrometry 23, 915-926 (2009).
localid: BGC1224
Brand, W. A., A. Chivulescu, L. Huang, H. Mukai, J. Richter and M. Rothe: Relating Air-CO2 Isotope Ratio Determinations to VPDB using Calcite-CO2 Mixed into CO2-free Air. In: Proceedings of the 14th WMO/IAEA Meeting of Experts on Carbon Dioxide, Other Greenhouse Gases, and Related Tracer Measurement Techniques, Helsinki, Sept. 2007 WMO-GAW Report 186. WMO-GAW, Helsinki (2009) 48-54.
localid: BGC1308
Relating Air-CO2 Isotope Ratio Determinations to VPDB using Calcite-CO2 Mixed into CO2-free Air, Proceedings of the 13th IAEA/WMO meeting of CO2 experts, Boulder, Sept. 2005. (13th IAEA/WMO meeting of CO2 experts, Boulder). .
localid: JCB_Eno_07_01428
Ghosh, P., M. Patecki, M. Rothe and W. A. Brand: Calcite-CO2 mixed intoCO(2)-free air: a new CO2-in-air stable isotope reference material for the VPDB scale. In: Rapid Communications in Mass Spectrometry 19, 1097-1119 (2005).
localid: BGC0805
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