Studies on the precise differential polarographic determination of elements of nuclear interest

Analytical chemistry

“…413 Trace amounts of rhenium in ores, slags, etc., have been determined polarographically after a separation of rhenium from other elements by steam distillation as rhenium heptoxide from concentrated sulphuric acid solution.414 A polarographic method has been described for the determination of microgram amounts of gold in blood and serum after the separation of gold from copper and iron by solvent extraction.415 Different'ial cathode-ray polarography has been applied to the determination of europium in solutions of lithium chloride and iodide with a precision of 0.1~o. 416 Small amounts of methanol have been determined by oxidation to formaldehyde with potassium permanganate in orthophosphoric acid followed by polarographic reduction of the formaldehyde to methanol at 50°.417 Polarographic methods have also been described for the determination of crotonaldehyde in vinyl acetate,418 of benzotriazole in inhibited ethylene with pyrolytic graphite and other solid ele~trodes.4~1 Voltammetric data have been reported for inorganic ions with boron carbide electrodes422 and a carbon paste electrode suitable for voltammetry in non-aqueous sol--snts has been described.423 A rapid voltammetric method based on the reduction of vanadium(v) to (IV) at a platinum electrode has been described for the determination of vanadium ( >0-01%) in steels. Common components of steel do not interfere.424…”