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Separation of osmium from geological materials by solvent extraction for analysis by thermal ionisation mass spectrometry

Cohen, Anthony S. and Waters, Frances G. (1996). Separation of osmium from geological materials by solvent extraction for analysis by thermal ionisation mass spectrometry. Analytica Chimica Acta, 332(21) pp. 269–275.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/0003-2670(96)00226-7
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Abstract

The solvent extraction of Os from geological samples digested in aqua regia has been investigated. A straightforward procedure has been developed in which OsO4 is partitioned directly from the aqua regia digest solution into an organic phase, either CCl4 or CHCl3, and is then recovered by back extraction into concentrated HBr. Following a simple micro-distillation step, the purified sample is ready for thermal ionisation mass spectrometry (TIMS). This new approach avoids hightemperature fusion, ion exchange or large-scale distillation techniques, while the simplicity of the handling procedures and the potential use of small reagent volumes ensures that blank contributions are kept to a minimum.

Item Type: Journal Article
ISSN: 0003-2670
Keywords: Mass spectrometry; Extraction; Osmium; Rhenium
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 11823
Depositing User: Anthony Cohen
Date Deposited: 08 Oct 2008 12:05
Last Modified: 02 Dec 2010 20:12
URI: http://oro.open.ac.uk/id/eprint/11823
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