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An Inter‐Laboratory Assessment of the Thorium Isotopic Composition of Synthetic and Rock Reference Materials
Author(s) -
Sims Kenneth W.W.,
Gill James B.,
Dosseto Anthony,
Hoffmann Dirk L.,
Lundstrom Craig C.,
Williams Ross W.,
Ball Lary,
Tollstrup Darren,
Turner Simon,
Prytulak Julie,
Glessner Justin J.G.,
Standish J.J.,
Elliott Tim
Publication year - 2008
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.2008.00870.x
Subject(s) - isotope dilution , thorium , inductively coupled plasma mass spectrometry , isotope , geology , icelandic , mass spectrometry , mineralogy , chemistry , geochemistry , uranium , physics , nuclear physics , linguistics , philosophy , chromatography
We present a concerted international effort to cross‐calibrate five synthetic Th isotope reference materials (UCSC Th “A”, OU Th “U”, WUN, IRMM‐35 and IRMM‐36), and six rock reference materials (UCSC TML, Icelandic ATHO, USGS BCR‐2, USGS W‐2, USGS BHVO‐2, LV18) using multi‐collector inductively coupled plasma‐mass spectrometry (MC‐ICP‐MS). We then compare our new values with a compilation of literature mass spectrometric data for these reference materials and derive recommended “consensus” 230 Th/ 232 Th values for each. We also present isotope dilution U and Th concentration data for four rock reference materials (UCSC TML, Icelandic ATHO, USGS BCR‐2, USGS W‐2).