A spectrophotometric method for the determination of rhenium in geologic materials

Existing methods for the chemical determination of rhenium have been modified and adapted for the analysis of rock, sediment, water, brine, and mineral concentrates.Little restriction is placed on sample size, but usually between 0.1 g and 100 g of solid sample is used which contains between 1 and 200 μg of rhenium giving a detection limit of 10 p.p.b. in the sample. Several liters of water sample may be used giving a detection limit of less than 1 p.p.b.The spectrophotometric method concentrates and isolates the rhenium from the sample by using carbon adsorption and solvent extraction.