Magnus Wendeberg, Juergen M. Richter, Michael Rothe, and Willi A. Brand, JRAS isotope reference: A generalized VPDB scale anchor for CO2 in air?, Proceedings of the 15^th IAEA/WMO meeting of CO₂ experts, Jena, Sept. 2009, WMO-GAW Report 194, ed. A. Jordan and W.A. Brand (2011) 180-185 (http://www.wmo.int/pages/prog/arep/gaw/gaw-reports.html)

Haiping Qi, Manfred Gröning, Tyler B. Coplen, Bryan Buck, Stanley J. Mroczkowski , Willi A. Brand, Heike Geilmann, and Matthias Gehre, Novel silver tubing method for quantitative introduction of water into high temperature conversion systems for stable hydrogen and oxygen isotopic measurements, Rapid Comm. Mass Spectrom. 2010; 24:1821-18277 (http://www3.interscience.wiley.com/journal/123491150/abstract)

Thomas Röckmann, Catalina X. Gómez Álvarez, Sylvia Walter, Carina van der Veen, Adam G. Wollny, Sachin S. Gunthe, Günther Helas, Ulrich Pöschl_, Frank Keppler,  Markus Greule and Willi A. Brand, Isotopic composition of H₂ from wood burning: Dependency on combustion efficiency, moisture content and δD of local precipitation, J. Geophys. Research 115 (2010), D17308, 1-11  (doi:10.1029/2009JD013188) 

Willi A. Brand, Sergey S. Assonov, Tyler B. Coplen, Correction for the ¹⁷O interference in δ(¹³C) determinations when analyzing CO₂ with stable isotope mass spectrometry, (IUPAC Technical Report), Pure Appl. Chem., (2010), 2010; 82 (8), 1719–1733 (doi:10.1351/PAC-REP-09-01-05)

Lloyd J, Patiño S, Paiva RQ, Nardoto GB, Quesada CA, Santos AJB, Baker TR, Brand WA, Hilke I, Geilmann H, Raessler M, Luizão FJ, Martinelli LA and Mercado LM, Optimisation of photosynthetic carbon gain and within-canopy gradients of associated foliar traits for Amazon forest trees. Biogeosciences 2010; 7, 1833–1859 (doi:10.5194/bg-7-1833-2010)

I. Vigano, T. Röckmann, R. Holzinger, F. Keppler, M. Greule, W.A. Brand, H. Geilmann, H. van Weelden, Water drives the deuterium content of the methane emitted from plants, Geochimica et Cosmochimica Acta
74 (2010) 3865–3873 (http://dx.doi.org/10.1016/j.gca.2010.03.030)

Willi. A. Brand, Alina Chivulescu, Lin Huang, Hitoshi Mukai, Juergen M. Richter, and Michael Rothe, Inter-laboratory calibration of CO₂ produced from NBS19 calcite, calibration of Narcis-II, and CO₂-isotopes in synthetic air, Proceedings of the 14^th IAEA/WMO meeting of CO₂ experts, Helsinki, Sept. 2007, WMO-GAW Report 186, ed. T. Laurila (2009), 48-55 (http://www.wmo.int/pages/prog/arep/gaw/gaw-reports.html)

I. Vigano, T. Röckmann, R. Holzinger, A. van Dijk, F. Keppler, M. Greule, W.A. Brand, H. Geilmann, H. van Weelden, The stable isotope signature of methane emitted from plant material under UV irradiation, Atmospheric Environment (2009), doi:10.1016/j.atmosenv.2009.07.046

Willi A. Brand, Tyler B. Coplen, Anita T. Aerts‑Bijma, J.K. Böhlke, Matthias Gehre, Heike Geilmann, Manfred Groening, Henk G. Jansen, Harro A.J. Meijer, Stanley J. Mroczkowski, Haiping Qi, Karin Soergel, Hilary Stuart-Williams, Stephan Weise, and Roland A. Werner, Comprehensive Inter-Laboratory Calibration of Reference Materials for δ¹⁸O versus VSMOW using Various on-Line High-Temperature Conversion Techniques, Rapid Comm. Mass Spectrom. 2009; 23: 999-1019 (DOI: 10.1002/rcm.3958)

Willi A. Brand, ‘Maintaining High Precision of Isotope Ratio Analysis over Extended Periods of Time’, Proceedings of the IAEA International Symposium on Quality Assurance for Analytical Methods in Isotope Hydrology, Vienna, Aug. 25-27 (2004), Isotopes in Environmental and Health Studies, 2009; 45: 135-149 (DOI: 10.1080/10256010902869097)

Lars W. Clement, Stephan C.W. Köppen , Willi A. Brand and Martin Heil, Strategies of a parasite of the ant – Acacia mutualism, Behavioral Ecology and Sociobiology, (2007) DOI 10.1007/s00265-007-0520-1

Elena Hettmann, Willi A. Brand, Gerd Gleixner, Improved isotope ratio measurement performance in liquid chromatography - isotope ratio mass spectrometry by removing excess oxygen.
Rapid Commun. Mass Spectrom. 2007; 21: 4135–4141

T. B. Coplen, W. A. Brand, M. Gehre, M. Groening, H. A. J. Meijer, B. Toman, and R. M. Verkouteren, After two decades a second anchor for the VPDB δ¹³C scale, Rapid Comm. Mass Spectrom.,  (2006) 20: 3165; (DOI: 10.1002/rcm.2727; http://www3.interscience.wiley.com/cgi-bin/abstract/113385466/ABSTRACT)

T. B. Coplen, W. A. Brand, M. Gehre, M. Groening, H. A. J. Meijer, B. Toman, and R. M. Verkouteren, New Guidelines for δ¹³C Measurements, Analytical Chemistry, Chemistry (2006) 78; 2439-2441 (DOI: 10.1021/ac052027c)

Hitoshi Mukai, Takakiyo Nakazawa, Willi A. Brand, Lin Huang, Colin Allison, James White, Markus Leuenberger,  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, WMO-GAW Report 168, ed. J.B Miller (2007),  41-46 http://www.wmo.int/pages/prog/arep/gaw/gaw-reports.html)

Prosenjit Ghosh, Michael Patecki, Michael Rothe, and Willi A. Brand, Calcite-CO₂ Mixed into CO₂-free Air: A New CO₂‑in-Air Stable Isotope Reference Material for the VPDB Scale, Rapid Comm. Mass Spectrom.,  (2005), 19: 1097-1119

U. Seibt, W.A. Brand, M. Heimann, J. Lloyd, J.P. Severinghaus and L. Wingate, Observations of O2 : CO2 exchange ratios during ecosystem gas exchange, Global Biogeochemical Cycles 18 (2004) GB4024 

M. Gehre, H. Geilmann, J. Richter, R.A. Werner, and W.A. Brand, Continuous Flow 2H/1H and 18O/16O Analysis of Water Samples with Dual Inlet Precision Rapid Comm. Mass Spectrom. (2004) 18: 2650–2660

Alexander Knohl, Roland A. Werner, Heike Geilmann and Willi A. Brand, Kel-FTM discs improve storage time of canopy air samples in 10-mL vials for CO₂-δ¹³C analysis, Rapid Comm. Mass Spectrom. (2004) 18: 1663–1665

Alexander Knohl, Roland A. Werner, Willi A. Brand, Nina Buchmann, Short-term variations in δ¹³C of ecosystem respiration reveals link between assimilation and respiration in a deciduous forest, Oecologia (2005) 142: 70-82; http://www.springerlink.com/index/10.1007/s00442-004-1702-4

Willi A. Brand, O₂/N₂ Storage Aspects and Open Split Mass Spectrometric Determination, Proceedings of the 12th IAEA/WMO meeting of CO₂ experts, Toronto, Sept. 2003, WMO-GAW Report 161, ed. D. Worthy and L. Huang (2005) 146-151; http://www.wmo.int/pages/prog/arep/gaw/gaw-reports.html

Prosenjit Ghosh and Willi A. Brand, Isotopic analysis of CO₂ in air samples: Requirements for a new CO₂ in-air standard and preparation of an air-CO₂ reference mixture from calcite material, Proceedings of the 12th IAEA/WMO meeting of CO₂ experts, Toronto, Sept. 2003, WMO-GAW Report 161, ed. D. Worthy and L. Huang (2005) 50-57; http://www.wmo.int/pages/prog/arep/gaw/gaw-reports.html

Michael Rothe, Armin Jordan and Willi A. Brand, Trace gases, δ¹³C and  δ¹⁸O of CO₂-in-air samples: Storage in glass flasks using PCTFE seals and other effects, Proceedings of the 12th IAEA/WMO meeting of CO₂ experts, Toronto, Sept. 2003, WMO-GAW Report 161, ed. D. Worthy and L. Huang (2005) 64-70; http://www.wmo.int/pages/prog/arep/gaw/gaw-reports.html

I. Levin, C.Facklam, M. Schmidt, M. Ramonet, P. Ciais, R. Langenfelds, C. Allison, R. Francey, A. Jordan, M. Rothe, W. A. Brand, R.E.M. Neubert, H.A.J. Meijer, T. Machida and H. Mukai, TACOS Sausage Flask Intercomparison Report 2003, 2nd annual report of the TACOS project 2004 (http://www.tacos.cnrs-gif.fr/)

W. A. Brand, 'Mass Spectrometer Hardware for Analyzing Stable Isotope Ratios', Chapter 38 in 'Handbook of Stable Isotope Analytical Techniques', 
Vol. 1, ed. P.A. de Groot, Elsevier Science, (ISBN: 0-444-51114-8) 2004, 835-856

Prosenjit Ghosh and Willi A. Brand, The effect of N₂O on the isotopic composition of air-CO₂ samples, Rapid Comm. Mass Spectrom.18 (2004) 1830-1838

P. Sturm, M. Leuenberger, C. Sirignano, R. Neubert, H.A.J. Meijer, R. Langenfelds, W.A. Brand and Y. Tohjiama, Permeation of atmospheric gases through polymer O-rings used in flasks for air sampling, J. Geophys. Res. 109, D04309 (2004)

B. Schulze, C. Wirth, P. Linke , W.A. Brand, I. Kuhlmann, V. Horna, E.-D. Schulze, Laser Ablation Combustion GC-IRMS - A new method for online analysis of intra-annual variation of δ¹³C in tree rings, Tree Physiol. 24 (2004) 1193-1201

Haiping Qi, Tyler B. Coplen, Heike Geilmann, Willi A. Brand, and J.K. Böhlke, Two new organic reference materials for δ¹³C and δ¹⁵N measurements and a new value for the δ¹³C of NBS 22 oil, Rapid Comm. Mass Spectrom. 17 (2003) 2483-2487

Prosenjit Ghosh and Willi A. Brand, Stable Isotope Ratio Mass Spectrometry in Climate Research, Int. J. Mass Spectrom. 228 (2003) 1-33

I. Levin, C.Facklam, M. Schmidt, M. Ramonet, P. Ciais, R. Langenfelds, C. Allison, R. Francey, A. Jordan, M. Rothe, W. A. Brand, R.E.M. Neubert and H.A.J. Meijer, TACOS Sausage Flask Intercomparison Report 2002, 1st annual report of the TACOS project 2003 (http://www.tacos.cnrs-gif.fr/)

P.D. Brooks, H. Geilmann and R. A. Werner, and W. A. Brand, Improved precision of coupled δ¹³C and δ¹⁵N measurements from single samples using an EA-IRMS (elemental analyzer - isotope ratio mass spectrometer) combination with a post-column 6-port valve and selective CO₂ trapping; Improved halide robustness of the combustion reactor using CeO₂., Rapid Comm. Mass Spectrom. 17 (2003) 1924-1926

M. Dörr, J. Käßbohrer, R. Grunert, G. Kreisel, W.A. Brand, R.A. Werner, H. Geilmann, C. Apfel, C. Robl, and W. Weigand, 'A possible Prebiotic Formation of Ammonia from Dinitrogen on Iron Sulfide Surfaces', Angew. Chemie 42 (2003) 1540-1543

Thomas Röckmann, Jan Kaiser, Carl A.M. Brenninkmeijer and Willi A. Brand, ' Gas-chromotography, isotope-ratio mass spectrometry method for high-precision position-dependent δ¹⁵N and δ¹⁸O measurements of nitrous oxide', Rapid Comm. Mass Spectrom. 17 (2003) 1897-1908

R. Michael Verkouteren, Sergey Assonov, Donna B. Klinedinst, and Willi A. Brand, Isotopic metrology of carbon dioxide (II): Effects of ion source materials, conductance, emission, and accelerating voltage on dual-inlet cross contamination, Rapid Comm. Mass Spectrom. 17 (2003) 777-782

Armin Jordan and Willi A. Brand, Technical Report: MPI-BGC, Germany, Proceedings of the 11th IAEA/WMO meeting of CO₂ experts, Tokyo, Sept. 2001, WMO-GAW Report 148, ed. S. Toru, (2003) 149-153 http://www.wmo.int/pages/prog/arep/gaw/gaw-reports.html 

I. Levin, U. Langendörfer, M. Schmidt, C.Facklam, R. Langenfelds, C. Allison, R. Francey, Jordan, W. A. Brand, R.E.M. Neubert, H.A.J. Meijer, K. Holmén, EuroSiberian Carbonflux: Technical Report CO₂ intercomparison, Proceedings of the 11th IAEA/WMO meeting of CO₂ experts, Tokyo, Sept. 2001, WMO-GAW Report 148, ed. S. Toru, (2003) 37-54
http://www.wmo.int/pages/prog/arep/gaw/gaw-reports.html 

M. Schmidt, P. Ciais, I. Levin, H. Meijer, R. Neubert, M. Ramonet, W.A. Brand and R. Francey, The European Intercomparison Project for Greenhouse Gas Monitoring (TACOS-Infrastructure), Proceedings of the 11th IAEA/WMO meeting of CO₂ experts, Tokyo, Sept. 2001, WMO-GAW Report 148, ed. S. Toru, (2003) 32- 36 http://www.wmo.int/pages/prog/arep/gaw/gaw-reports.html

Jon Lloyd, Colin A. Allison, Ray Langenfelds, Roger J. Francey, Manuel Gloor, Daniil Zolotukhine, Nadja Tchebakova , Willi A. Brand, Roland A. Werner, Armin Jordan , Olga Shibistova and E.-D. Schulze, A First Trace Gas Climatology above Zotino, Central Siberia, Tellus 54 (2002) 749

Julie M. Styles, Michael R. Raupach, Graham D. Farquar, Ofal E.E. Kolle, Kieran A. Lawton, Willi A. Brand, Roland A. Werner, Armin Jordan, E.-Detlef Schulze, Olga Shibistova and Jon Lloyd, Soil and canopy CO₂, ¹³CO₂, H₂O and sensible heat flux partitions in a forest canopy inferred from concentration measurements, Tellus 54 (2002) 655

Roland A. Werner, Michael Rothe and Willi A. Brand, Extraction of CO₂ from air samples for isotopic analysis and limits to ultra high precision δ¹⁸O determination in CO₂ gas , Rapid Comm. Mass Spectrom. 15 (2001) 2152-2167

Röckmann, T., J. Kaiser, C.A.M. Brenninkmeijer, W.A. Brand, R. Borchers, J.N. Crowley, M. Wollenhaupt and P.J. Crutzen, The position dependent ¹⁵N enrichment of nitrous oxide in the stratosphere, Isot. Environ. Health Stud. (2001), 37 (2001) 91-95

Roland A. Werner and Willi A. Brand, Referencing Strategies and Techniques in Stable Isotope Ratio Analysis, Rapid Comm. Mass Spectrom. 15 (2001) 501-519

W. A. Brand and T. B. Coplen, An interlaboratory study for testing instrument performance of hydrogen dual-inlet isotope-ratio mass spectrometers, Fresenius Z. Anal. Chem. 370 (2001) 358

Röckmann, T., J. Kaiser, C.A.M. Brenninkmeijer, J.N. Crowley, R. Borchers, W. A. Brand, and P.J. Crutzen, The isotopic enrichment of nitrous oxide (¹⁵N¹⁴NO, ¹⁴N¹⁵NO, ¹⁴N¹⁴N¹⁸O) in the stratosphere and in the laboratory, J. Geophys. Res. 106(D10), 10403  (2001)

M.E. Wieser and W. A. Brand, 'Isotope Ratio Studies using Mass Spectrometry' in 'Encyclopedia of Spectroscopy and Spectrometry',ed. J.C. Lindon, G.E. Tranter and J.L. Holmes, Academic Press, ISBN 0-12-226680-3, (1999), 1072-1086

M.E. Wieser and W. A. Brand, A Laser Extraction / Combustion Technique for in Situ δ¹³C Analysis of Organic and Inorganic materials, Rapid Comm. Mass Spectrom. 13 (1999) 1218

R.A. Werner, B.A. Bruch and W. A. Brand, ConFlo III - An Interface for High Precision δ¹³C and δ¹⁵N Analysis with an Extended Dynamic Range, Rapid Comm. Mass Spectrom. 13 (1999) 1237

A.W. Hilkert, C.B. Douthitt, H.J. Schlueter and W. A. Brand, 'Isotope Ratio Monitoring GCMS of D/H by High Temperature Conversion Isotope Ratio Mass Spectrometry', Rapid Comm. Mass Spectrom 13 (1999) 1226

W. A. Brand, 'Isotope Mass Spectrometry: Precision from Transient Signals', in Adv. Mass Spectrom. , Volume 14, eds. E.J. Karjalainen, A.E. Hesso, J.E. Jalonen and U.P. Karjalainen, Elsevier, Amsterdam (1998), 661-686

Hener U, Brand W. A., Hilkert AW, Juchelka D, Mosandl A, Podebrad F., Simultaneous on-line analysis of O-18/O-16 and C-13/C-12 ratios of organic compounds using GC-pyrolysis-IRMS, Z. Lebensm. Unters. F A 206: (3) 230-232 1998

Thielecke F, Brand W., Noack R., Hydrogen Isotope Determination For Small-Size Water Samples Using An Equilibration Technique, J. Mass Spectrom. 33: (4) 342-345 APR 1998

Pel R, Oldenhuis R, Brand W., Vos A, Gottschal JC, Zwart KB, Stable-isotope analysis of a combined nitrification-denitrification sustained by thermophilic methanotrophs under low-oxygen conditions, App. Environ. Microb. 63: (2) 474-481 Feb 1997

Fry B, Garritt R, Tholke K, Brand W., Mersch FJ., Cryoflow: Cryofocusing nanomole amounts of CO₂, N₂, and SO₂ from an elemental analyzer for stable isotopic analysis, Rapid Comm. Mass Spectrom. 10: (8) 953-958 1996

Hofmann D, Brand W.A., Microcombustion of ng amounts of carbon in non-volatile materials for isotope ratio evaluation, Isot. Environ. Health Stud. 32, 255-262 (1996)

Brand W.A., Avak H, Seedorf R, Hofmann D, Conradi T, New methods for fully automated isotope ratio determination from hydrogen at the natural abundance level, Isot. Environ. Healt Stud. 32, 263-273 (1996)

Brand W.A., Dobberstein P., Isotope-ratio-monitoring liquid chromatography mass spectrometry (IRM-LCMS): First results from a moving wire interface system, Iso. Environ. Health Stud. 32, 275-283 (1996)

Brand W.A., High Precision Isotope Ratio Monitoring Techniques in Mass Spectrometry, J. Mass Spectrom. 31: (3) 225-235 Mar 1996

Brand W. A., PreCon: A fully automated interface for the pre-GC concentration of trace gases in air for isotopic analysis. Isotopes Environ. Health Stud. 31, 277-284 (1995)

Giesemann A, Jager HJ, Norman AL, Krouse HR, Brand W.A., Online Sulfur-Isotope Determination using an Elemental Analyzer Coupled to a Mass-Spectrometer, Anal Chem 66: (18) 2816-2819 Sep 15 1994

Merritt D.A., Brand W.A., Hayes J.M., Isotope-Ratio-Monitoring Gas-Chromatography Mass-Spectrometry - Methods for Isotopic Calibration, Org Geochem 21: (6-7) 573-583 Jun-Jul 1994

Brand W.A., Tegtmeyer AR, Hilkert A., Compound-Specific Isotope Analysis - Extending toward N-15/N-14 and O-18/O-16, Org Geochem 21: (6-7) 585-594 Jun-Jul 1994

Meier Augenstein W, Brand W., Hoffmann GF, Rating D, Bridging The Information Gap Between Isotope Ratio Mass-Spectrometry And Conventional Mass-Spectrometry, Biol Mass Spectrom 23: (6) 376-378 Jun 1994

Brand W.A., Tegtmeyer A.R., and A. Hilkert, 1994, Compound- specific isotope analysis: extending toward ¹⁵N/¹⁴N and ¹⁸O/¹⁶O. Organic Geochemistry, 21, 585-594.

Fry B, Brand W, Mersch FJ, Tholke K, Garritt R, Automated-Analysis System For Coupled Delta-C-13 And Delta-N-15 Measurements, Anal Chem 64: (3) 288-291 Feb 1 1992

Rautenschlein M., Habfast K., and W. Brand, 1990, High precision measurement of ¹³C/¹²C by on-line combustion of GC eluates and isotope ratio mass spectrometry, pp. 133-148 in Stable Isotopes in Paediatric,Nutritional and Metabolic Research (eds. T.E. Chapman, R. Berger, D.J. Reyngoud), A. Okken, Intercept, Groningen.

Oesselmann J, Brand W, Trapping Box Dedicated For The 15N/14N and ¹³C/¹²C Isotope Ratio Determination In Medical-Research, Food Science, Agriculture And Environmental-Research Appl Radiat Isotopes 39: (6) 603-603 1988

Brand W.A., Habfast K., and M. Ricci, 1989, On-line combustion and high precision isotope ratio monitoring of organic compounds, Adv. Mass Spectrom. 11B, ed. P. Longevialle, Heyden and Son, London, p. 1800.

Hayes J.M., Freeman K.H., Ricci M.P., Studley S.A., Schoell M., Moldowan J.M., Carlson R., Gallegos E., Habfast K., and W. Brand, 1989, A new approach to isotope-ratio-monitoring gas chromatography mass spectrometry, Advances in Mass Spectrometry 11B., ed. P. Longevialle, Heyden and Son, London, p. 1108.

Brand W. A., Baer T., Dissociation Dynamics of Energy-Selected C₅H₁₀⁺ Ions J Am Chem Soc 106: (11) 3154-3160 1984

Brand W. A., Stocklov J, Walther HJ., Conversion of Field-Ionization Kinetics Data to Unimolecular Rate-Constant Functions - a Simple Numerical Approach, Int J Mass Spectrom 59: (1) 1-20 1984

Baer T, Brand W. A., Bunn TL and Butler JJ., Isomerization of Internal-Energy-Selected Ions Faraday Discuss (75) 45-55 1983

Bramer EM, Weger E, Ischtwan J, Brand W, Levsen K., Photodissociation of some Small Heteroatom-Containing Organic Ions, Int J Mass Spectrom 55: (1) 83-91 1983

Weger E, Brand W. A., Levsen K., Photo-Dissociation of Gaseous [C₄H₅N]⁺ Ions, Org Mass Spectrom 18: (12) 534-537 1983

Brand W. A., Levsen K., Approximate Determination of Absolute Unimolecular Rate Constants using the Field-Ionization Kinetic Method, Int J Mass Spectrom 51: (2-3) 135-154 1983

Brand W. A., Baer T., Unimolecular Dissociation of Energy-Selected T-Butylbenzene Ions and Effect of Thermal Energy on Data-Analysis, Int J Mass Spectrom 49: (2) 103-112 1983

Brand W. A., Baer T, Klots CE., Kinetic-Energy Release Distribution in the Fragmentation of Energy-Selected Iodopropane Ions, Chem Phys 76: (1) 111-120 1983

Brand W., Beckey HD, Fassbender B, et al., The Temperature-Dependence of Unimolecular Decomposition Processes following Field-Ionization, Int J Mass Spectrom 35: (1-2) 11-22 1980

Brand W., Levsen K., Thermal-Energy Distribution and Energy Deposition during Field-Ionization Int J Mass Spectrom 35: (1-2) 1-9 1980