Methods for the separation of rhenium, osmium and molybdenum applicable to isotope geochemistry
Talanta
By: J. W. Morgan, D. W. Golightly, and A. F. Dorrzapf Jr.
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Abstract
Effective methods are described for the chemical separation of rhenium, osmium and molybdenum. The methods are based on distillation and anion-exchange chromatography, and have been the basis for rhenium—osmium isotope studies of ore deposits and meteorites. Successful anion-exchange separation of osmium requires both recognition and careful control of the osmium species in solution; thus, distillation of osmium tetroxide from a mixture of sulfuric acid and hydrogen peroxide is preferred to anion-exchange. Distribution coefficients measured for perrhenate in sulfuric acid media are sufficiently high (Kd > 500) for rhenium to be directly loaded onto an ion-exchange column from a distillation residue and subsequently eluted with nitric acid. Polymerization of molybdenum species during elution is prevented by use of a solution that is 1M in hydrochloric acid and 1M in sodium chloride.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Methods for the separation of rhenium, osmium and molybdenum applicable to isotope geochemistry |
| Series title | Talanta |
| DOI | 10.1016/0039-9140(91)80045-2 |
| Volume | 38 |
| Issue | 3 |
| Year Published | 1991 |
| Language | English |
| Publisher | Elsevier |
| Description | 7 p. |
| First page | 259 |
| Last page | 265 |