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

Journal of the Brazilian Chemical Society

Valdomiro L. Martins²  Roberto K. Harrop Galvão¹  Mário César U. De Araújo²  Edvaldo Da Nóbrega Gaião¹ 

[1] ,Universidade Federal da Paraíba Departamento de Química João Pessoa PB ,Brazil

关键词: potentiometric stripping analysis;    wavelet transform;    lead;    copper;    water analysis;   

DOI  :  10.1590/S0103-50532009000800025

来源: SciELO

【 摘 要 】

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%.

【 授权许可】

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