Publikationsdatum:
2014-06-15
Beschreibung:
A comprehensive method for the precise determination of Re, Os, Ir, Ru, Pt and Pd concentrations, as well as Os isotopic compositions in geological samples is presented. Samples were digested by the Carius tube method and the Os was extracted by conventional CCl 4 method. The Re, Ir, Ru, Pt and Pd were first subgroup separated from the matrix elements into Re-Ru, Ir-Pt and Pd by a 2 ml anion exchange column. Subsequently, the Re-Ru was further purified by a secondary 0.25 ml anion exchange column, or by microdistillation of Ru using CrO 3 -H 2 SO 4 as an oxidant followed by a secondary 0.25 ml anion exchange separation of Re. The Pd and Ir-Pt were further successively purified by an Eichrom-LN column to completely remove Zr and Hf, respectively. Rhenium, Ir, Ru, Pt and Pd were individually measured by multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS), except for Ru after micro-distillation purification was analysed by negative thermal ionisation mass spectrometry (N-TIMS). The analytical results for peridotite reference material WPR-1 agree well with the previously published data. Finally, several mafic rock reference materials including TDB-1, WGB-1, BHVO-2, BCR-2, BIR-1a and DNC-1a were analysed for Re-Os isotopes and platinum-group element concentrations to test their suitability for certification. This article is protected by copyright. All rights reserved.
Print ISSN:
1639-4488
Digitale ISSN:
1751-908X
Thema:
Geologie und Paläontologie
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