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- W2154804984 abstract "In 1999 the Istituto di Geoscienze e Georisorse (IGG), with the support of the International Atomic Energy Agency (IAEA), undertook the collection, preparation and distribution of eight geological materials intended for a blind interlaboratory comparison of measurements of boron isotopic composition and concentration. The materials came from Italian sources and consist of three natural waters (Mediterranean seawater and two groundwaters) and five rocks and minerals (tourmaline, basalt, obsidian, limestone and clay). The solid materials were crushed, milled and mixed, in preparation for distribution. Extensive assays performed at the IGG on these materials demonstrated that their boron isotopic and chemical compositions are homogeneous. Additional homogeneity tests were carried out on solid material fragments at the GeoForschungsZentrum Potsdam, with the specific objective of investigating the suitability of some of them for the calibration in situ of micro-analytical techniques. Two materials, B4 (tourmaline) and B6 (obsidian), proved to be isotopically homogeneous and may become excellent references for in situ microanalyses of boron isotopes. The materials described here were used as the basis of a major laboratory intercomparison study and are now available for further distribution from either the IAEA (solid materials) or the IGG (waters). L'Istituto di Geoscienze e Georisorse (IGG), avec le soutien de l'Agence Internationale de l'Energie Atomique (AIEA), a entrepris en 1999 la récolte, la préparation et la distribution de huit matériaux géologiques dans le but de conduire une comparaison en aveugle des mesures de composition isotopique et de concentration du bore entre différents laboratoires. Les matériaux, qui dérivent tous de sites italiens, comprennent trois eaux naturelles (une eau de la Mer Méditerranée et deux eaux souterraines) et cinq roches et minéraux (tourmaline, basalte, obsidienne, calcaire et argile). Pour la distribution, les matériaux solides ont été réduits en fragments, broyés et mélangés et leur homogénéité de composition isotopique et chimique du bore a été vérifiée par des essais exhaustifs. D'autres essais d'homogénéité ont été effectués au GeoForschungsZentrum Potsdam sur des fragments des matériaux solides avec le but particulier d'étudier la possibilité d'utilisation de ces matériaux pour la calibration in situ des techniques microanalytiques. Deux matériaux, le B4 (tourmaline) et le B6 (obsidienne), se sont révélés isotopiquement homogènes et donc peuvent devenir d'excellents matériaux de référence pour les microanalyses isotopiques in situ du bore. Les matériaux, qui sont décrits dans cette note, ont été utilisés pour une étude d'intercomparaison des mesures isotopiques et chimiques du bore entre différents laboratoire. Ils sont maintenant à disposition a l'AIEA (matériaux solides) et à l'IGG (eaux) pour leur distribution ultérieure." @default.
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- W2154804984 date "2003-03-01" @default.
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- W2154804984 title "Intercomparison of Boron Isotope and Concentration Measurements. Part I: Selection, Preparation and Homogeneity Tests of the Intercomparison Materials" @default.
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- W2154804984 doi "https://doi.org/10.1111/j.1751-908x.2003.tb00710.x" @default.
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