Re-Os Isotopic Measurements at the Femtomole Level in Natural Samples |
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| Authors: | Jean Louis Birck Matthieu Roy Barman Françoise Capmas |
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| Institution: | Laboratoire de Géochimie et Cosmochimie, Institut de Physique du Globe, 4, Place Jussieu, 75252 Paris Cedex 05, France, |
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| Abstract: | Here we describe a new chemical separation method for Os and an improved mass spectrometric procedure for Re and Os. This technique is based on the selective extraction of OsO4 from aqueous solution in liquid bromine. Among other advantages, this procedure avoids the cumbersome distillation procedure for Os and uses only commercial "off the shelf" PFA teflon labware. Blank levels for 0.5 g sample sizes are: 0.06 pg and 0.5 pg for Os and Re respectively. Samples containing as little as 1 pg g?1 Os can be analysed reliably with this method. Adaptation to other dissolution methods is also discussed. |
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