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%.
Main Authors: | Martins,Valdomiro L., Galvão,Roberto K. Harrop, Araújo,Mário César U. de, Gaião,Edvaldo da Nóbrega |
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Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Química
2009
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Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000800025 |
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