Fast and simultaneous determination of Pb2+ and Cu2+ in water samples using a solid paraffin-based carbon paste electrode chemically modified with 2-aminothiazole-silica-gel

Journal of the Brazilian Chemical Society

Santos, André L¹  Silva, Daiane H¹  Universidade Federal de Uberlândia, Ituiutaba, Brazil¹  Takeuchi, Regina M¹  Costa, Dayane A¹ 

关键词: anodic stripping voltammetry;    carbon paste electrode;    2 -aminothiazole-functionalized silica gel;    lead and copper determination;    water samples;   

DOI  :  10.1590/S0103-50532011000900015

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

A solid paraffin-based carbon paste electrode modified with 2-aminothiazole functionalized silica-gel was used for simultaneous quantification of Pb2+ and Cu2+ in water samples by anodic stripping voltammetry. The present method uses short preconcentration time (180 s), which allowed reliable and simultaneous quantification of Pb2+ and Cu2+ in a very fast way. Detection limits of 7.3 and 90 nmol L-1 were obtained for Pb2+ and Cu2+, respectively. These values are below their maximum concentrations allowed in drinking water by Brazilian legislation, indicating that the proposed method is useful to monitoring Pb2+ and Cu2+ in water samples. Recovery studies were performed in four spiked water samples and the results shown recovery percentages close to 100% for all analyzed samples, demonstrating the good accuracy of the proposed method.

【 授权许可】

Unknown