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  • 1.
    Gonfiantini, Roberto
    et al.
    Istituto di Geoscienze e Georisorse, Area di Ricerca del CNR, I-56124 Pisa, Via G. Moruzzi 1, Italy.
    Tonarini, Sonia
    Istituto di Geoscienze e Georisorse, Area di Ricerca del CNR, I-56124 Pisa, Via G. Moruzzi 1, Italy.
    Gröning, Manfred
    International Atomic Energy Agency, Division of Physical and Chemical Sciences, Vienna, Austria.
    Adorni-Braccesi, Alessandra
    Istituto di Geoscienze e Georisorse, Area di Ricerca del CNR, I-56124 Pisa, Via G. Moruzzi 1, Italy.
    Al-Ammar, Assad S.
    Department of Chemistry, University of Massachusetts, Amherst, MA, United States.
    Astner, Marcus
    Departement für Chemie und Biochemie, Universität Bern, Switzerland.
    Bächler, Sebastien
    Departement für Chemie und Biochemie, Universität Bern, Switzerland.
    Barnes, Ramon M.
    Department of Chemistry, University of Massachusetts, Amherst, MA, United States.
    Bassett, Randy L.
    Geochemical Technologies Corporation, Wheat Ridge, CO, United States.
    Cocherie, Alain
    Bureau de Recherches Géologiques et Minières, France.
    Deyhle, Annette
    GEOMAR, Kiel, Germany.
    Dini, Andrea
    Istituto di Geoscienze e Georisorse, Area di Ricerca del CNR, I-56124 Pisa, Via G. Moruzzi 1, Italy.
    Ferrara, Giorgio
    Istituto di Geoscienze e Georisorse, Area di Ricerca del CNR, I-56124 Pisa, Via G. Moruzzi 1, Italy.
    Gaillardet, Jérôme
    Institut de Physique du Globe, Université de Paris VI, Paris, France.
    Grimm, Judith
    Departement für Chemie und Biochemie, Universität Bern, Switzerland.
    Guerrot, Catherine
    Bureau de Recherches Géologiques et Minières, France.
    Krähenbühl, Urs
    Departement für Chemie und Biochemie, Universität Bern, Switzerland.
    Layne, Graham
    Woods Hole Oceanographic Institution, Woods Hole, MA, United States.
    Lemarchand, Damien
    Institut de Physique du Globe, Université de Paris VI, Paris, France.
    Meixner, Anette
    GeoForschungsZentrum Potsdam, Potsdam, Germany.
    Northington, Jack
    West Coast Analytical Services, Santa Fe Springs, CA, United States.
    Pennisi, Maddalena
    Istituto di Geoscienze e Georisorse, Area di Ricerca del CNR, I-56124 Pisa, Via G. Moruzzi 1, Italy.
    Reitznerová, Eva
    Department of Chemistry, University of Massachusetts, Amherst, MA, United States.
    Rodushkin, Ilya
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Sugiura, Naoji
    Department of Earth and Planetary Science, University of Tokyo, Japan.
    Surberg, Regina
    GEOMAR, Kiel, Germany.
    Tonn, Sabine
    GeoForschungsZentrum Potsdam, Potsdam, Germany.
    Wiedenbeck, Michael
    GeoForschungsZentrum Potsdam, Potsdam, Germany.
    Wunderli, Samuel
    Eidgenössische Materialprüfungs- und Forschungsanstalt, St. Gallen, Switzerland.
    Xiao, Yingkai
    Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai, China.
    Zack, Thomas
    Department of Earth Science, Memorial University of Newfoundland, St. John's, NL, Canada.
    Intercomparison of Boron Isotope and Concentration Measurements. Part II: Evaluation of Results2005In: Geostandards Newsletter, ISSN 0150-5505, Vol. 27, no 1, p. 41-57Article in journal (Refereed)
    Abstract [en]

    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 δ11 B 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.

  • 2.
    Kin, Fung Dai
    et al.
    Eduardo Mondlane University, Department of Chemistry.
    Prudencio, M. Isabel
    Instituto Tecnologico e Nuclear, Portugal.
    Gouviera, M. Angela
    Instituto Tecnologico e Nuclear, Portugal.
    Magnusson, Erik
    Luleå University of Technology.
    Determination of rare earth elements in geological reference materials: a comparative study by INAA and ICP-MS1999In: Geostandards Newsletter, ISSN 0150-5505, Vol. 23, no 1, p. 47-58Article in journal (Refereed)
    Abstract [en]

    Data was obtained for the rare earth elements (REE) by instrumental neutron activation analysis (INAA) and inductively coupled plasma-mass spectrometry (ICP-MS) in twenty geological reference materials. In general, the precision obtained by ICP-MS is better for the light REE, decreasing with increasing atomic number. This is partly a result of the occurrence of the heavy REE at low concentrations. The precision of the data obtained by INAA is good (<5% RSD). The data obtained also showed that for the elements determined by both methods, the accuracy is similar for the light REE and better for the middle and heavy REEs by INAA. Higher uncertainty is achieved by ICP-MS mainly for elements at very low concentrations, occurring at about ten times the chondritic values

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