A DIFFERENTIAL-PULSE POLAROGRAPHIC STUDY OF THE CADMIUM(II)-NITRILOTRIACETIC ACID SYSTEM - APPLICATION OF A SIMPLE AND VERSATILE SIMULATION

A differential pulse polarographic (DPP) simulation for a system invol ving a reversible dissociation coupled with two electrode reactions is described. The simulation is employed to investigate the effects of e quilibrium and rate constants on DPP peak currents and potentials. Exp erimental results for the cadmium(II)-nitrilotriacetic acid system are shown to be in good agreement with simulated curves incorporating val ues for the appropriate kinetic and thermodynamic parameters in the ra nge of these reported in the literature. The simulation has been emplo yed to investigate the application of DPP with variable pulse width in the characterization of similar systems.