Manufacturing of Electrochemical Modified Graphite Electrodes to Determine Some Metal Traces

This research includes preparation of new working Modified Graphite Electrodes (MGE). The first modified electrode based on 1,3-di phenyl-5-P-nitro phenyl formazan in order to Deferential Pulse Anodic Stripping Voltammetric (DPASV) determination of lead and cadmium ions simultaneously in aqueous solutions and the second one based on benzaldehyde-2,4-dinitro phenyl hydrazone to determine silver ions in aqueous solutions. After that, studying the effect of the most important analytical and technical conditions (Electrolyte, Electrolyte Concentration and pH. Accumulation potential, Accumulation time, Potential scanning rate and Pulse amplitude) on the voltammetric curves. Standard deviation SD(Cd)= 0.020mg/l, SD(Pb)= 0.021mg/l and SD(Ag)= 0.011mg/l.