Abstract
The oxidation–reduction of Mn(II) was studied in 0.1 M KCl on a grafted polymer electrode (GPE) (the materials of GPE are polystyrene grafted with acrylonitrile as a monomer using gamma irradiation) during cyclic voltammetric technique. The oxidation–reduction current peaks of manganese appear at +0.28 and −0.35 V respectively, on GPE versus Ag/AgCl as reference electrode. The redox current peaks of Mn(II) at GPE were enhanced in comparison with other solid working electrodes such as glassy carbon electrode, Pt-E and Au-E. Hence, it can be used GPE for analyzed manganese ions by cyclic voltammetry technique, which depending on different concentration. Based on the calibration curve obtained, a linear graph of up to 0.1 mM Mn(II), with an impressive sensitivity response of R 2 = 0.9862 and Y = 9.0238X + 7.0821 was obtained. Based on chronoamperometric and Chronocoulometric techniques, a diffusion coefficient for Mn(II) at GPE was determined.
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