A Calibration Strategy for Stripping Voltammetry of Lead on Silver Electrodes

This work presents a calibration strategy for stripping voltammetry which enables improving and testing accuracy, using as an example quantitative determination of lead ions on a silver electrode. The proposed procedure integrates the interpolative and extrapolative conventional calibration methods. In the proposed approach the accuracy of determination is verified by the evaluation of the statistical agreement of the results obtained in standard addition and a series of standard methodologies. In the experiments only the standard solutions used to perform quantification are required. The application of procedures of baseline subtraction may decrease the value of systematic error, therefore such an algorithm constitutes an essential part of the described methodology and has been given in detail. The proposed calibration strategy has been tested for the determination of Pb(II) ions in certified reference material (CRM) water samples.