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

Universidade Federal Rural de Pernambuco, Serra Talhada, Brazil¹  Araújo, Mário César U. de¹  Gaião, Edvaldo da Nóbrega¹  Galvão, Roberto K. Harrop¹  Martins, Valdomiro L.¹  Instituto Tecnológico de Aeronáutica, São José dos Campos, Brazil¹  Universidade Federal da Paraíba, João Pessoa, Brazil¹ 

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

DOI  :  10.1590/S0103-50532009000800025

学科分类：化学（综合）

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】

Unknown