Al(III) and Fe(III) Balance in Hemodialysis Treatment Assessed via Fluid Analysis by Adsorptive Stripping Voltammetry and UV Sample Digestion

Simultaneous determination of Al(III) and Fe(III) in posthemodialysis fluids was investigated by the Adsorptive stripping voltammetry of solochrome violet metal complexes. The adsorption of the complexes on the mercury electrode (HMDE) was investigated by out of phase altenating current voltammetry in presence of the main matrix interfering species. Sample digestion by UV irradiation was investigated to overcome the matrix interference. The proposed method was valid for real posthemodialysis samples containing or not Desferrioxamine B. Detection limits of 1.4 and 1.8 μg L−1 were calculated for Al(III) and Fe(III), respectively. Recoveries ranging from 88.1 to 106.3% were obtained from spiking experiments.