Oscillopolarographic determination of nanogram quantities of rhenium with prior concentration on a stationary mercury electrode

Abstract

1. It was shown for the first time that rhenium can be concentrated on a stationary mercury electrode (drop) in form of ReO2. The electrodissolution of the film that is formed leads, with linear potential scan, to the formation of a peak on the differential oscillograms whose height is directly proportional to Re(VII) concentration in solution over the range 5.10−9–1.10−7 M/liter. 2. The following do not interfere with the rhenium determination: Mo in 10,000-fold excess, W in 100-fold excess, and Cu and Pb in 50,000-fold excess. NO3− ions must be absent from the solution.