Abstract
The interaction between rhenium(VII) and dithio-oxamide in strongly alkaline medium in presence of tin(II) chloride as reluctant has been studied. A purple complex is obtained, with λ max 526 nm and ϵ max = 4.0 × 10 3 l.mole −1.cm −1. The reaction has been applied to the determination of rhenium in tungsten—rhenium alloy after its anodic electrochemical dissolution in alkaline medium. A 1000-fold excess of molybdenum or tungsten does not interfere. A modification of the proposed method can be used as a spot-test for rapid control of rhenium content in industrial solutions.
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