Wavelet-Based determination of Cu and Pb in water samples using potentiometric stripping analysis with a Lab-Made potentiostat

this paper demonstrates the possibility of simultaneously determining lead and copper in mineral, river and tap water by potentiometric stripping analysis using a low-cost lab-made potentiostat and a wavelet-based signal processing method. pb(ii) and cu(ii) concentrations were found to be in the range 3-7 μg l-1. relative standard deviations were on average smaller than 3%, which is satisfactory in view of the trace concentration. for comparison, the determination was also carried out by using a high-end commercial equipment (μautolab type ii, eco chemie). the average and standard deviation of the results were similar to those obtained with the lab-made potentiostat. no significant statistical difference was verified according to a paired t-test at a confidence level of 95%.