Abstract

The reaction of perrhenate with hydroxylammonium chloride (NH3OHCl) has been studied. Hydroxylammonium chloride reacts with rhenium in 8–10 M sodium hydroxide solution to produce a yellow complex which has λmax. at 300 nm with a molar absorptivity of 7.9 × 103 l mol–1 cm–1. The stoicheiometry of the complex has been studied spectrophotometrically using different procedures. A method for the spectrophotometric determination of rhenium has been developed, and this has been applied to the determination of rhenium in molybdenum-rhenium and tungsten-rhenium alloys.

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