%0 Journal Article %T Intercomparison of Boron Isotope and Concentration Measurements. Part II: Evaluation of Results %+ CNR Istituto di Geoscienze e Georisorse [Pisa] (IGG-CNR) %+ International Atomic Energy Agency [Vienna] (IAEA) %+ University of Massachusetts [Amherst] (UMass Amherst) %+ Universität Bern [Bern] (UNIBE) %+ Geochemical Technologies Corporation %+ Bureau de Recherches Géologiques et Minières (BRGM) (BRGM) %+ Helmholtz Centre for Ocean Research [Kiel] (GEOMAR) %+ Institut de Physique du Globe de Paris (IPG Paris) %+ Woods Hole Oceanographic Institution (WHOI) %+ GeoForschungsZentrum - Helmholtz-Zentrum Potsdam (GFZ) %+ Luleå University of Technology (LUT) %+ The University of Tokyo (UTokyo) %+ Eidgenössische Materialprüfungs und Forschungsanstalt - Swiss Federal Laboratories for Materials Science and Technology %+ Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, China %+ Memorial University of Newfoundland = Université Memorial de Terre-Neuve [St. John's, Canada] (MUN) %A Gonfiantini, Roberto %A Tonarini, Sonia %A Gröning, Manfred %A Adorni-Braccesi, Alessandra %A Al-Ammar, Assad %A Astner, Marcus %A Bächler, Sebastien %A Barnes, Ramon %A Bassett, Randy %A Cocherie, Alain %A Deyhle, Annette %A Dini, Andrea %A Ferrara, Giorgio %A Gaillardet, Jérôme %A Grimm, Judith %A Guerrot, Catherine %A Krähenbühl, Urs %A Layne, Graham %A Lemarchand, Damien %A Meixner, Anette %A Northington, D. Jack %A Pennisi, Maddalena %A Reitznerová, Eva %A Rodushkin, Ilia %A Sugiura, Naoji %A Surberg, Regina %A Tonn, Sabine %A Wiedenbeck, Michael %A Wunderli, Samuel %A Xiao, Yingkai %A Zack, Thomas %< avec comité de lecture %@ 1639-4488 %J Geostandards and Geoanalytical Research %I Wiley %V 27 %N 1 %P 41-57 %8 2003-03 %D 2003 %R 10.1111/j.1751-908X.2003.tb00711.x %Z Sciences of the Universe [physics]/Earth SciencesJournal articles %X The Istituto di Geoscienze e Georisorse (IGG), on behalf and with the support of the International Atomic Energy Agency (IAEA), prepared eight geological materials (three natural waters and five rocks and minerals), intended for a blind interlaboratory comparison of measurements of boron isotopic composition and concentration. The materials were distributed to twenty seven laboratories - virtually all those performing geochemical boron isotope analyses in the world -which agreed to participate in the intercomparison exercise. Only fifteen laboratories, however, ultimately submitted the isotopic and/or concentration results they obtained on the intercomparison materials. The results demonstrate that interlaboratory reproducibility is not well reflected by the precision values reported by the individual laboratories and this observation holds true for both boron concentration and isotopic composition. The reasons for the discrepancies include fractionations due to the chemical matrix of materials, relative shift of the zero position on the δ11B scale and a lack of well characterized materials for calibrating absolute boron content measurements. The intercomparison materials are now available at the IAEA (solid materials) and IGG (waters) for future distribution. %G English %L hal-04083719 %U https://brgm.hal.science/hal-04083719 %~ BRGM