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Spectrophotometric determination of rhenium in alkaline solution

L. V. Borisova, А. Н. Ермаков, А.Б. Исмагулова

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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Available abstract

Key concepts: Rhenium, Perrhenate, Chemistry, Molar absorptivity, Molybdenum, Inorganic chemistry, Sodium hydroxide, Tungsten