Direct Measurement of Femtomoles of Osmium and the 187 Os/ 186 Os Ratio in Seawater-Reference-Cited by-同舟云学术

Direct Measurement of Femtomoles of Osmium and the 187 Os/ 186 Os Ratio in Seawater

Published:1998-10-09 Issue:5387 Volume:282 Page:272-274
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Levasseur Sylvain¹,Birck Jean-Louis¹,Allègre Claude J.¹

Affiliation:

1. Laboratoire de Géochimie et Cosmochimie, Unité de Recherche Associée of CNRS 1758, Institut de Physique du Globe de Paris, Université Paris 7, 4 place Jussieu, 75252 Paris Cedex 05, France.

Abstract

Two depth profiles of the osmium concentration and the 187 Os/ 186 Os isotopic ratio in the Indian Ocean showed that the osmium concentration seems to be unaltered by chemical or biological processes occuring in seawater; accordingly, osmium is conservative. These data were obtained from an experimental method that eliminated the problems related to osmium preconcentration. This method led to a new evaluation of the concentration of osmium in seawater; the mean concentration of osmium and the 187 Os/ 186 Os ratio are equal to 10.86 ± 0.07 picograms per kilogram and 8.80 ± 0.07, respectively. The results suggest the existence of an organocomplex that dominates the speciation of osmium in seawater.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference34 articles.

1. Richter F. M., Turekian K. K., Earth Planet. Sci. Lett. 119, 121 (1993).

2. Sharma M., Papanastassiou D. A., Wasserburg G. J., Geochim. Cosmochim. Acta 61, 3287 (1997).

3. Koide M., Goldberg E. D., Walker R., Deep-Sea Res. Part II 43, 53 (1996).

4. Birck J. L., Roy Barman M., Capmas F., Geostand. Newslett. 20, 19 (1997).

5. All samples were collected with a rosette multisampler with polyvinyl chloride bottles. Conductivity temperature and pressure were monitored with a CTD probe. The depth and salinity were derived from the CTD data. After recovery all the samples were stored in Pyrex bottles. Before being used these bottles were degassed at 600° to 650°C. The characteristics of the glass of a degassed bottle are 187 Os/ 186 Os = 6.06 ± 0.08 and [Os] = 0.22 parts per trillion. To prevent bacterial growth or planktonic evolution we added HgCl 2 to the seawater samples.

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