Carbon screen-printed electrodes (CSPEs) modified with metal nanoparticles present an interesting alternative in the determination of chromium(VI) by differential pulse voltammetry (DPV). Metallic silver and gold nanoparticle deposits have been obtained by electrochemical deposition. Scanning electron microscopy measurements show that the electrochemically synthesized silver and gold nanoparticles are deposited in aggregated form. The detection limit for the analytical procedures developed in this work were 8.5 x 10(-7) and 4.0 x 10(-1) M for silver and gold nanoparticle-modifed CSPE, respectively. In terms of reproducibility, the precision of the above-mentioned method was calculated at 6.7% in %R.S.D. values for silver and 3.21% for gold nanoparticle CSPE. (C) 2008 Elsevier B.V. All rights reserved.
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Univ Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, SpainUniv Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, Spain
Alberto, Elena
Bastos-Arrieta, Julio
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Univ Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, Spain
Univ Barcelona UB, Water Res Inst IdRA, Marti i Franques 1-11, Barcelona 08028, SpainUniv Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, Spain
Bastos-Arrieta, Julio
Perez-Rafols, Clara
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Univ Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, Spain
Univ Barcelona UB, Water Res Inst IdRA, Marti i Franques 1-11, Barcelona 08028, SpainUniv Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, Spain
Perez-Rafols, Clara
Serrano, Nuria
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Univ Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, Spain
Univ Barcelona UB, Water Res Inst IdRA, Marti i Franques 1-11, Barcelona 08028, SpainUniv Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, Spain
Serrano, Nuria
Diaz-Cruz, M. Silvia
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Spanish Council Sci Res CSIC, Inst Environm Assessment & Water Res IDAEA, Dept Environm Chem, Jordi Girona 18-26, Barcelona 08034, SpainUniv Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, Spain
Diaz-Cruz, M. Silvia
Diaz-Cruz, Jose Manuel
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Univ Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, Spain
Univ Barcelona UB, Water Res Inst IdRA, Marti i Franques 1-11, Barcelona 08028, SpainUniv Barcelona UB, Dept Chem Engn & Analyt Chem, Marti i Franques 1-11, Barcelona 08028, Spain