Low-blank digestion of geological samples for platinum-group element analysis using a modified Carius Tube design |
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| Authors: | M Rehk?mper Alex N Halliday and Roy F Wentz |
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| Institution: | (1) Department of Geological Sciences, The University of Michigan, Ann Arbor, MI 48109-1063, USA e-mail: markrehk@umich.edu, US;(2) Department of Chemistry, The University of Michigan, Ann Arbor, MI 48109-1055, USA, US |
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| Abstract: | We have developed a modified Carius Tube design that permits the low-blank digestion of geological samples prior to platinum-group
element analysis. The new Carius Tubes incorporate a liner of high-purity quartz glass that retains the sample and acids during
the digestion procedure. This dramatically reduces the comparatively high Pt blank associated with dissolutions in conventional
Carius Tubes. Using the new Carius Tube design we are able to achieve total procedural blanks for the determination of the
PGE in geological samples that are at the 1–15 pg/g level for Ru, Pd, Ir and Pt. This constitutes a reduction of blank values
by a factor of ∼10–100 compared to standard NiS fire assay sample preparation techniques.
Received: 23 September 1997 / Revised: 24 October 1997 / Accepted: 31 October 1997 |
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