USE OF DIFFERENT INORGANIC COMPLEXANTS AS ELUENTS FOR CATION-EXCHANGE SEPARATION OF SILVER FROM LEAD

In order to separate silver from lead by cation exchange chromatography, different complexants, namely Na2SO3, KSCN, CH3COONH4 were examined as eluents. The best results were obtained for 5 % Na2SO3. Thus, trace and milligram amounts of silver were separated from lead by elution of the first with 5 % Na2SO3 solution from a column with DOWEX 50 (H + form). Lead was then eluted with 2M-HNO3. The eluted metal ions were analysed by AAS technique. The separation was fairly sharp and quantitative and the method was used to analyse synthetic mixtures