Author/Authors :
Stankovic، Dalibor نويسنده Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia , , Roglic، Goran نويسنده Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia , , Andjelkovic، Ivan نويسنده Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia , , Skrivan، Sandra نويسنده Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia , , Manojlovic ، Dragan نويسنده Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia ,
Abstract :
The analysis of Cu(II) by anodic stripping voltammetry using a Nafion-modified
glassy 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 calibration
curve was linear in the range 15×10-8–5.6×10-5 mol/L. The detection limit was 8.9 x10-8
mol/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 was
also performed. A significant increase in current was achieved at the modified electrode
compared to a bare glassy carbon electrode. For explanation of voltammetric behavior of
modified electrode in copper solution, cyclic voltammograms were recorded. The electrode
has been used in the direct determination of Cu(II) in water.
