| 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. ?? 1991. |
| Genre: | Article |
| ProdID: | 70016943 |
| Citation Author: | Morgan, J. W.; Golightly, D. W.; Dorrzapf, Jr. , A. F. |
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| Citation End Page: | 265 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Talanta |
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| Citation Number Of Pages: | 7 |
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| Citation Search Results Text: | Methods for the separation of rhenium, osmium and molybdenum applicable to isotope geochemistry; 1991; Article; Journal; Talanta; Morgan, J. W.; Golightly, D. W.; Dorrzapf, Jr. , A. F. |
| Citation Start Page: | 259 |
| Citation Volume: | 38 |
| Citation Year: | 1991 |
| Type: | citation/reference |
| Text: | Methods for the separation of rhenium, osmium and molybdenum applicable to isotope geochemistry; 1991; Article; Journal; Talanta; Morgan, J. W.; Golightly, D. W.; Dorrzapf, Jr. , A. F. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1991 00:00 -0600 |
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