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1.
  • Gonfiantini, Roberto, et al. (författare)
  • Intercomparison of Boron Isotope and Concentration Measurements. Part II: Evaluation of Results
  • 2005
  • Ingår i: Geostandards Newsletter. - 0150-5505. ; 27:1, s. 41-57
  • Tidskriftsartikel (refereegranskat)abstract
    • 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.
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2.
  • Rodushkin, Ilia, et al. (författare)
  • Elemental stable isotope assessment of groundwater contamination: Recent developments
  • 2022
  • Ingår i: Current Opinion in Environmental Science & Health. - : Elsevier. - 2468-5844. ; 26
  • Forskningsöversikt (refereegranskat)abstract
    • Anthropogenic contamination of water resources remains a severe environmental concern on a global scale. Radiogenic and stable isotope measurements (especially for light elements) constitute well-known tools for the identification of pollution sources and thus have considerable potential in prevention and remediation efforts. Recent instrumental and methodological advances have extended the isotope ‘toolbox’ to include a significant number of new stable isotope systems, which in turn resulted in rapid growth of studies using these novel tracers in the field of environmental forensics. Isotopic fractionation, occurring during post-release transformation of contaminants, offers an additional benefit of possibility to study the fate of pollutants in aquatic systems. This review will focus on selected relevant studies in the field and present future trends and development.
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