Brewer, P. J.; Kim, J. S.; Lee, S.; Tarasova, O. A.; Viallon, J.; Flores, E.; Wielgosz, R. I.; Shimosaka, T.; Assonov, S.; Allison, C. E. et al.; van der Veen, A. M. H.; Hall, B.; Crotwelli, A. M.; Rhoderick, G. C.; Hodges, J. T.; Mohn, J.; Zellweger, C.; Moossen, H.; Ebert, V.; Griffith, D. W. T.: Advances in reference materials and measurement techniques for greenhouse gas atmospheric observations. Metrologia 56, 034006 (2019)

Greule, M.; Moossen, H.; Geilmann, H.; Brand, W. A.; Keppler, F.: Methyl sulfates as methoxy isotopic reference materials for delta¹³C and delta²H measurements. Rapid Communications in Mass Spectrometry 33 (4), S. 343 - 350 (2019)

Koester, D.; Villalobos, I. M. S.; Jochmann, M. A.; Brand, W. A.; Schmidt, a. T. C.: New concepts for the determination of oxidation efficiencies in liquid chromatography isotope ratio mass spectrometry. Analytical Chemistry 91 (8), S. 5067 - 5073 (2019)

Rodionov, A.; Lehndorff, E.; Stremtan, C. C.; Brand, W. A.; Königshoven, H.-P.; Amelung, W.: Spatial microanalysis of natural ¹³C/¹²C abundance in environmental samples using laser ablation-isotope ratio mass spectrometry. Analytical Chemistry 91 (9), S. 6225 - 6232 (2019)

Ostrom, N. E.; Gandhi, H.; Coplen, T. B.; Toyoda, S.; Böhlke, J.K.; Brand, W. A.; Casciotti, K. L.; Dyckmans, J.; Giesemann, A.; Mohn, J. et al.; Well, R.; Yu, L.; Yoshida, N.: Preliminary assessment of stable nitrogen and oxygen isotopic composition of USGS51 and USGS52 nitrous oxide reference gases and perspectives on calibration needs. Rapid Communications in Mass Spectrometry 32 (15), S. 1207 - 1214 (2018)

Umezawa, T.; Brenninkmeijer, C. A. M.; Röckmann, T.; van der Veen, C.; Tyler, S. C.; Fujita, R.; Morimoto, S.; Aoki, S.; Sowers, T.; Schmitt, J. et al.; Bock, M.; Beck, J.; Fischer, H.; Michel, S. E.; Vaughn, B. H.; Miller, J. B.; White, J. C.; Brailsford, G.; Schaefer, H.; Sperlich, P.; Brand, W. A.; Rothe, M.; Blunier, T.; Lowry, D.; Fisher, R. E.; Nisbet, E. G.; Rice, A. L.; Bergamaschi, P.; Veidt, C.; Levin, I.: Interlaboratory comparison of delta ¹³C and deltaD measurements of atmospheric CH₄ for combined use of data sets from different laboratories. Atmospheric Measurement Techniques 11 (2), S. 1207 - 1231 (2018)

Mance, D.; Geilmann, H.; Brand, W. A.; Kewitz, T.; Kersten, H.: Changes of ²H and ¹⁸O abundances in water treated with non-thermal atmospheric pressure plasma jet. Plasma Processes and Polymers 14 (10), e1600239 (2017)

Qi, H.; Coplen, T. B.; Gehre, M.; Vennemann, T. W.; Brand, W. A.; Geilmann, H.; Olack, G.; Bindeman, I. N.; Palandri, J.; Huang, L. et al.; Longstaffe, F. J.: New biotite and muscovite isotopic reference materials, USGS57 and USGS58, for δ²H measurements–A replacement for NBS 30. Chemical Geology 467, S. 89 - 99 (2017)

Meusinger, C.; Dusek, U.; King, S. M.; Holzinger, R.; Rosenørn, T.; Sperlich, P.; Julien, M.; Remaud, G. S.; Bilde, M.; Röckmann, T. et al.; Johnson, M. S.: Chemical and isotopic composition of secondary organic aerosol generated by alpha-pinene ozonolysis. Atmospheric Chemistry and Physics 17 (10), S. 6373 - 6391 (2017)

Gehre, M.; Renpenning, J.; Geilmann, H.; Qi, H.; Coplen, T. B.; Kümmel, S.; Ivdra, N.; Brand, W. A.; Schimmelmann, A.: Optimization of on-line hydrogen stable isotope ratio measurements of halogen- and sulfur-bearing organic compounds using elemental analyzer–chromium/high-temperature conversion isotope ratio mass spectrometry (EA-Cr/HTC-IRMS). Rapid Communications in Mass Spectrometry 31 (6), S. 475 - 484 (2017)