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Methods for the separation of rhenium, osmium and molybdenum applicable to isotope geochemistry

January 1, 1991

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.

Citation Information

Publication Year 1991
Title Methods for the separation of rhenium, osmium and molybdenum applicable to isotope geochemistry
DOI
Authors J.W. Morgan, D.W. Golightly, A.F. Dorrzapf
Publication Type Article
Publication Subtype Journal Article
Series Title Talanta
Series Number
Index ID 70016943
Record Source USGS Publications Warehouse
USGS Organization