Extraction of zinc(II) and cadmium(II) from ammonium thiocyanate solutions has been studied in benzene in the presence of
pyridine. The effect of such variables as the pH of aqueous phase and concentration of metal, thiocyanate and pyridine on
extraction has been investigated and the extracting species identified. Extraction behaviour of silver(I), manganese(II),
cobalt(II), mercury(II) and thallium(III) has also been studied under identical conditions and some binary metal ion separations
of analytical and radiochemical importance are reported.