Premium
A Comprehensive Method for Precise Determination of Re, Os, Ir, Ru, Pt, Pd Concentrations and Os Isotopic Compositions in Geological Samples
Author(s) -
Chu Zhuyin,
Yan Yan,
Chen Zhi,
Guo Jinghui,
Yang Yueheng,
Li Chaofeng,
Zhang Yanbin
Publication year - 2015
Publication title -
geostandards and geoanalytical research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.037
H-Index - 73
eISSN - 1751-908X
pISSN - 1639-4488
DOI - 10.1111/j.1751-908x.2014.00283.x
Subject(s) - rhenium , chemistry , platinum group , analytical chemistry (journal) , inductively coupled plasma mass spectrometry , ruthenium , mass spectrometry , ion exchange , matrix (chemical analysis) , isotope , platinum , ion , chromatography , inorganic chemistry , catalysis , physics , biochemistry , organic chemistry , quantum mechanics
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 CC l 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 microdistillation 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.