Speciation of copper, lead and cadmium in aquatic systems by circulating dialysis combined wiht flame AAS

摘要

The assessment of free Cu(II), Pb(II) and Cd(II) ions in the presence of complexes species was realised by a circulating dialysis with Cupropahn planar membranes and subsequent quantification by flame atomic absorption spectrometry. The effect of the flow rate, the time of equilibration, pH and the presence of various complexing agents in the donor solutions were studied. The determination of free Cu(II), Pb(II) and Cd(II) ions in the presence of soil fumic substances resulted from the above studies.