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Intercomparison of Boron Isotope and Concentration Measurements. Part II: Evaluation of Results
Istituto di Geoscienze e Georisorse, Area di Ricerca del CNR, I-56124 Pisa, Via G. Moruzzi 1, Italy.
Istituto di Geoscienze e Georisorse, Area di Ricerca del CNR, I-56124 Pisa, Via G. Moruzzi 1, Italy.
International Atomic Energy Agency, Division of Physical and Chemical Sciences, Vienna, Austria.
Istituto di Geoscienze e Georisorse, Area di Ricerca del CNR, I-56124 Pisa, Via G. Moruzzi 1, Italy.
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2005 (Engelska)Ingår i: Geostandards Newsletter, ISSN 0150-5505, Vol. 27, nr 1, s. 41-57Artikel i tidskrift (Refereegranskat) Published
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.

Ort, förlag, år, upplaga, sidor
2005. Vol. 27, nr 1, s. 41-57
Nationell ämneskategori
Geokemi
Forskningsämne
Tillämpad geologi
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URN: urn:nbn:se:ltu:diva-16135DOI: 10.1111/j.1751-908X.2003.tb00711.xISI: 000183782900004Scopus ID: 2-s2.0-84864345841Lokalt ID: fb92a7f8-ba2b-4590-882b-c46184dd8e2bOAI: oai:DiVA.org:ltu-16135DiVA, id: diva2:989111
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Godkänd; 2005; 20120809 (andbra)

Tillgänglig från: 2016-09-29 Skapad: 2016-09-29 Senast uppdaterad: 2022-03-18Bibliografiskt granskad

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Rodushkin, Ilya

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