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Low-blank digestion of geological samples for platinum-group element analysis using a modified Carius Tube design

Authors
  • Rehkämper, M.1
  • Halliday, Alex N.1
  • Wentz, Roy F.2
  • 1 Department of Geological Sciences, The University of Michigan, Ann Arbor, MI 48109-1063, USA e-mail: [email protected], US
  • 2 Department of Chemistry, The University of Michigan, Ann Arbor, MI 48109-1055, USA, US
Type
Published Article
Journal
Fresenius' Journal of Analytical Chemistry
Publisher
Springer-Verlag
Publication Date
May 01, 1998
Volume
361
Issue
2
Pages
217–219
Identifiers
DOI: 10.1007/s002160050866
Source
Springer Nature
Keywords
License
Yellow

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.

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