Electrotransport purification of thorium under low pressure conditions

Schmidt, F. A.; Lunde, B. K.; Outlaw, R. A.

doi:10.2514/6.1979-308

Cited by 1 publication

(1 citation statement)

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“…The 233 U spike was local to Los Alamos National Laboratory (LANL) and was calibrated against NBS U‐960, which is purified uranium (99.975 ± 0.006%) sourced from a natural ore body. The high purity 229 Th spike, from the Oak Ridge National Laboratory, was calibrated against a solution of dissolved 232 Th metal (99.98% Th) from the Ames Laboratory (Schmidt et al. 1979).…”

Section: Methodsmentioning

confidence: 99%

Uranium and Thorium Concentration and Isotopic Composition in Five Glass (BHVO-2G, BCR-2G, NKT-1G, T1-G, ATHO-G) and Two Powder (BHVO-2, BCR-2) Reference Materials

Matthews

Murrell

Goldstein

et al. 2010

Geostandards and Geoanalytical Research

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Here we report uranium and thorium isotopic ratios and elemental concentrations measured in solid reference materials from the USGS (BHVO‐2G, BCR‐2G, NKT‐1G), as well as those from the MPI‐DING series (T1‐G, ATHO‐G). Specifically created for microanalysis, these naturally‐sourced glasses were fused from rock powders. They cover a range of compositions, elemental concentrations and expected isotopic ratios. The U‐Th isotopic ratios of two powdered source materials (BCR‐2, BHVO‐2) were also characterised. These new measurements via multi‐collector thermal ionisation mass spectrometry and multi‐collector inductively coupled plasma‐mass spectrometry can now be used to assess the relative performance of techniques and facilitate comparison of U‐Th data amongst laboratories in the geoscience community for in situ and bulk analyses.

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Section: Methodsmentioning

confidence: 99%