Willi A. Brand

About disagreements in inter-comparison activities of isotope ratio measurements for CO2, Proceedings of the 13th IAEA/WMO meeting of CO2 experts, Boulder, Sept. 2005 (2007)

Mukai, H., Nakazawa, T., Brand, Willi A., Huang, L., Levin, I., Allison, C. E., ...

Improved isotope ratio measurement performance in liquid chromatography/isotope ratio mass spectrometry by removing excess oxygen (2007)

Hettmann, E., Brand, Willi A., Gleixner, Gerd

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 (2007)

Brand, Willi A., Rothe, Michael, Richter, Joachim

New Guidelines for δ13C Measurements (2006)

Toman, Blaza, Meijer, Harro A.J., Gröning, Manfred, Gehre, Matthias, Brand, Willi A., Coplen, Tyler B., ...

Consistency of δ13C measurements can be improved 39-47% by anchoring the δ13C scale with two isotopic reference materials differing substantially in 13C/12C. It is recommended that δ13C values of...

After two decades a second anchor for the VPDB δ13C scale (2006)

Toman, Blaza, Meijer, Harro A.J., Gröning, Manfred, Gehre, Matthias, Brand, Willi A., Coplen, Tyler B., ...

After two decades a second anchor for the VPDB delta C-13 scale (2006)

Coplen, T. B., Brand, Willi A., Gehre, M., Groning, M., Meijer, H. A. J., Toman, B., ...

New guidelines for delta C-13 measurements (2006)

Coplen, T. B., Brand, Willi A., Gehre, M., Groning, M., Meijer, H. A. J., Toman, B., ...

Short-term variations in delta C-13 of ecosystem respiration reveals link between assimilation and respiration in a deciduous forest (2005)

Knohl, Alexander, Werner, Roland A., Brand, Willi A., Buchmann, Nina

Calcite-CO2 mixed intoCO(2)-free air: a new CO2-in-air stable isotope reference material for the VPDB scale (2005)

Ghosh, Prosenjit, Patecki, M., Rothe, Michael, Brand, Willi A.

Mass spectrometer hardware for analyzing stable isotope ratios (2004)

Brand, Willi A.

Observations of O2 : CO2 exchange ratios during ecosystem gas exchange (2004)

Seibt, U., Brand, Willi A., Heimann, Martin, Lloyd, Jonathan, Severinghaus, J. P., Wingate, L.

Permeation of atmospheric gases through polymer O-rings used in flasks for air sampling (2004)

Sturm, P., Leuenberger, M., Sirignano, C., Neubert, R. E. M., Meijer, H. A. J., Langenfelds, Ray L., ...

The effect of N2O on the isotopic composition of air-CO2 samples (2004)

Ghosh, Prosenjit, Brand, Willi A.

Kel-F (TM) discs improve storage time of canopy air samples in 10-mL vials for CO2-delta C-13 analysis (2004)

Knohl, Alexander, Werner, Roland A., Geilmann, Heike, Brand, Willi A.

Continuous flow H-2/H-1 and and(18)O/O-16 analysis of water samples with dual inlet precision (2004)

Gehre, M., Geilmann, Heike, Richter, J., Werner, Roland A., Brand, Willi A.

Laser ablation-combustion-GC-IRMS - a new method for online analysis of intra-annual variation of delta C-13 in tree rings (2004)

Schulze, Birgit, Wirth, Christian, Linke, P., Brand, Willi A., Kuhlmann, I., Horna, Viviana, ...

Gas chromatography/isotope-ratio mass spectrometry method for high-precision position-dependent 15N and 18O measurements of atmospheric nitrous oxide (2003)

Röckmann,Thomas, Kaiser,Jan, Brenninkmeijer,Carl A. M., Brand,Willi A.

We describe an automated gas chromatography/isotope-ratio mass spectrometry (GC/IRMS) method for the determination of the 18O and position-resolved 15N content of nitrous oxide at natural isotope...

Gas chromatography/isotope-ratio mass spectrometry method for high-precision position-dependent 15N and 18O measurements of atmospheric nitrous oxide (2003)

Röckmann, Thomas, Kaiser, Jan, Brenninkmeijer, Carl A. M., Brand, Willi A.

We describe an automated gas chromatography/isotope-ratio mass spectrometry (GC/IRMS) method for the determination of the 18O and position-resolved 15N content of nitrous oxide at natural isotope...

Improved precision of coupled delta13C and delta15N measurements from single samples using an elemental analyser/isotope ratio mass spectrometer combination with a post-column sixport valve and selective CO2 trapping; improved halide robustness of the combustion reactor using CeO2 (2003)

Brooks, P. D., Geilmann, Heike, Werner, Roland A., Brand, Willi A.

A possible prebiotic formation of ammonia from dinitrogen on iron sulfide surfaces (2003)

Dorr, M., Kassbohrer, J., Grunert, R., Kreisel, G., Brand, Willi A., Werner, Roland A., ...

Stable isotope ratio mass spectrometry in global climate change research (2003)

Ghosh, Prosenjit, Brand, Willi A.

Two new organic reference materials for delta C-13 and delta N-15 measurements and a new value for the delta C-13 of NBS 22 oil (2003)

Qi, H. P., Coplen, T. B., Geilmann, Heike, Brand, Willi A., Bohlke, J. K.

Gas chromatography/isotope-ratio mass spectrometry method for high-precision position-dependent N-15 and O-18 measurements of atmospheric nitrous oxide (2003)

Röckmann, T., Kaiser, J., Brenninkmeijer, C. A. M., Brand, Willi A.

Isotopic metrology of carbon dioxide. II. Effects of ion source materials, conductance, emission, and accelerating voltage on dual-inlet cross contamination (2003)

Verkouteren, R. Michael, Assonov, Sergey, Klinedinst, Donna B., Brand, Willi A.

Soil and canopy CO2, (CO2)-C-13, H2O and sensible heat flux partitions in a forest canopy inferred from concentration measurements (2002)

Styles, J. M., Raupach, M. R., Farquhar, G. D., Kolle, Olaf, Lawton, K. A., Brand, Willi A., ...

A trace-gas climatology above Zotino, central Siberia (2002)

Lloyd, Jonathan, Langenfelds, Ray L., Francey, R. J., Gloor, Manuel, Tchebakova, N. M., Zolotoukhine, D., ...