AN INVESTIGATION ON THE EXTRACTION CONCENTRATION OF MICROELEMENTS FROM AQUEOUS SOLUTION FOR ATOM-ABSORBTION ANALYSIS

摘要

Some sodium diethyldithiocarbamate and 8-oxyquinoline based mixtures were tested as potential extractant to concentrate solutions containing ions of Cu 2+ , Co 2+ , Pb 2+ , Ni 2+ , Zn 2+ , Fe 3+ , Cd 2+ while preparing the samples for atom-absorption analysis. The mixture of butylacetate/sodium diethyldithiocarbamate has shown the best performance. The method of the metal ions determination that combines the sample concentration using this extractant followed by the flame atom-absorption spectroscopy provides high sensitivity and selectivity outperforming characteristics as compared to the classical method of evaporation the concentration of samples.