Quantitative separation of molybdenum and rhenium from geological materials for isotopic analysis by MC-ICP-MS
Quantitative separation of molybdenum and rhenium from geological materials for isotopic analysis by MC-ICP-MS
We have developed a new chemical procedure for the quantitative separation of molybdenum (Mo) and rhenium (Re) from a wide variety of geological samples. A single pass anion exchange separation provided complete recovery of pure Mo and Re in a form that was ideal for subsequent isotope and abundance determination by multi-collector inductively coupled plasma-mass spectroscopy (MC-ICP-MS). An enriched 100Mo-97Mo solution, mixed with the sample before digestion, enabled natural mass-dependant isotopic fractionation of Mo to be determined with an external reproducibility of < 0.12‰ (?98Mo/95Mo, 2s). Determination of the concentration of Mo and Re in the same sample was achieved by isotope dilution, with instrumental mass-fractionation of Re being corrected by the simultaneous measurement of the 191Ir/193Ir ratio. We have applied the new procedure to a variety of samples, including seawater, basalt and organic-rich mudrock. The procedure is ideally suited to palaeoredox studies requiring the precise determination of the Mo isotope composition and the Re/Mo ratio from the same sample
molybdène, rhénium, chromatographie par échange d'ions, MC-ICP-MS, molybdenum, rhenium, ion exchange chromatography
219-229
Pearce, Christopher R.
c83b6228-0b64-4f5a-a8ad-e5cd33a11de3
Cohen, Antony S.
ea9a048b-2d13-416d-92c3-612d29e26264
Parkinson, Ian J.
f199f02a-6c0d-429a-b3a1-144305668383
June 2009
Pearce, Christopher R.
c83b6228-0b64-4f5a-a8ad-e5cd33a11de3
Cohen, Antony S.
ea9a048b-2d13-416d-92c3-612d29e26264
Parkinson, Ian J.
f199f02a-6c0d-429a-b3a1-144305668383
Pearce, Christopher R., Cohen, Antony S. and Parkinson, Ian J.
(2009)
Quantitative separation of molybdenum and rhenium from geological materials for isotopic analysis by MC-ICP-MS.
Geostandards and Geoanalytical Research, 33 (2), .
(doi:10.1111/j.1751-908X.2009.00012.x).
Abstract
We have developed a new chemical procedure for the quantitative separation of molybdenum (Mo) and rhenium (Re) from a wide variety of geological samples. A single pass anion exchange separation provided complete recovery of pure Mo and Re in a form that was ideal for subsequent isotope and abundance determination by multi-collector inductively coupled plasma-mass spectroscopy (MC-ICP-MS). An enriched 100Mo-97Mo solution, mixed with the sample before digestion, enabled natural mass-dependant isotopic fractionation of Mo to be determined with an external reproducibility of < 0.12‰ (?98Mo/95Mo, 2s). Determination of the concentration of Mo and Re in the same sample was achieved by isotope dilution, with instrumental mass-fractionation of Re being corrected by the simultaneous measurement of the 191Ir/193Ir ratio. We have applied the new procedure to a variety of samples, including seawater, basalt and organic-rich mudrock. The procedure is ideally suited to palaeoredox studies requiring the precise determination of the Mo isotope composition and the Re/Mo ratio from the same sample
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Published date: June 2009
Keywords:
molybdène, rhénium, chromatographie par échange d'ions, MC-ICP-MS, molybdenum, rhenium, ion exchange chromatography
Organisations:
Geochemistry
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Local EPrints ID: 342512
URI: http://eprints.soton.ac.uk/id/eprint/342512
ISSN: 0150-5505
PURE UUID: 2f1c51df-3ff1-4c32-91a3-24f5d54704b6
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Date deposited: 07 Sep 2012 11:00
Last modified: 14 Mar 2024 11:53
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Author:
Christopher R. Pearce
Author:
Antony S. Cohen
Author:
Ian J. Parkinson
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