SW Anodic Stripping Voltammetry Determination of Copper with New Tape of Modified GC Electrode

The analysis of cu(ii) by anodic stripping voltammetry using a nafion-modifiedglassy carbon electrode incorporated with cu-dpaba complex (dpaba is methyl 3,5-bis{bis-[(pyridin-2-yl)methyl]amino}methyl)benzoate ) (cu-dpaba–na/gce) is described.cu(ii) was accumulated in hac-naac buffer ph=4 at potential of -0.3 v (vs. ag/agcl ref.electrode) and then determined with swasv. under the optimum conditions the calibrationcurve was linear in the range 15×10-8–5.6×10-5 mol/l. the detection limit was 8.9 x10-8mol/l. different parameters and conditions, such as volume of nafion and cu-dpaba,accumulation time and ph value was optimized. a study of the interfering substances wasalso performed. a significant increase in current was achieved at the modified electrodecompared to a bare glassy carbon electrode. for explanation of voltammetric behavior ofmodified electrode in copper solution, cyclic voltammograms were recorded. the electrodehas been used in the direct determination of cu(ii) in water.