%0 Journal Article
%T Wavelet-Based determination of Cu and Pb in water samples using potentiometric stripping analysis with a Lab-Made potentiostat
%A Martins
%A Valdomiro L.
%A Galv£¿o
%A Roberto K. Harrop
%A Ara¨²jo
%A M¨¢rio C¨¦sar U. de
%A Gai£¿o
%A Edvaldo da N¨®brega
%J Journal of the Brazilian Chemical Society
%D 2009
%I Sociedade Brasileira de Qu¨ªmica, SBQ
%R 10.1590/S0103-50532009000800025
%X 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 ¦Ìg 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 (¦Ìautolab 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%.
%K potentiometric stripping analysis
%K wavelet transform
%K lead
%K copper
%K water analysis.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532009000800025&lng=en&nrm=iso&tlng=en