Electroanalysis of Trace Inorganic Arsenic with Gold Nanoelectrode Ensembles
A. Mardegan
Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy
CIVEN, Via delle Industrie 5, 30175,Venezia-Marghera, Italy
Search for more papers by this authorCorresponding Author
P. Scopece
CIVEN, Via delle Industrie 5, 30175,Venezia-Marghera, Italy
P. Scopece, CIVEN, Via delle Industrie 5, 30175,Venezia-Marghera, Italy
P. Ugo, Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy
Search for more papers by this authorF. Lamberti
Department of Chemical Science, University of Padua, via Marzolo 1, 35131 Padova, Italy
Search for more papers by this authorM. Meneghetti
Department of Chemical Science, University of Padua, via Marzolo 1, 35131 Padova, Italy
Search for more papers by this authorL. M. Moretto
Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy
Search for more papers by this authorCorresponding Author
P. Ugo
Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy
P. Scopece, CIVEN, Via delle Industrie 5, 30175,Venezia-Marghera, Italy
P. Ugo, Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy
Search for more papers by this authorA. Mardegan
Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy
CIVEN, Via delle Industrie 5, 30175,Venezia-Marghera, Italy
Search for more papers by this authorCorresponding Author
P. Scopece
CIVEN, Via delle Industrie 5, 30175,Venezia-Marghera, Italy
P. Scopece, CIVEN, Via delle Industrie 5, 30175,Venezia-Marghera, Italy
P. Ugo, Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy
Search for more papers by this authorF. Lamberti
Department of Chemical Science, University of Padua, via Marzolo 1, 35131 Padova, Italy
Search for more papers by this authorM. Meneghetti
Department of Chemical Science, University of Padua, via Marzolo 1, 35131 Padova, Italy
Search for more papers by this authorL. M. Moretto
Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy
Search for more papers by this authorCorresponding Author
P. Ugo
Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy
P. Scopece, CIVEN, Via delle Industrie 5, 30175,Venezia-Marghera, Italy
P. Ugo, Department of Molecular Sciences and Nanosystems, University Ca' Foscari of Venice, S. Marta 2137, Venice, Italy
Search for more papers by this authorAbstract
The results of a study on the determination of trace levels of arsenic with nanoelectrode ensembles (NEEs) are reported. In order to lower the detection limit and to increase the number of performable analysis for each NEE, the right choice of the supporting electrolyte concentration and electroanalytical parameters were optimized. The electrochemical behavior of As(III) at NEEs was studied at first by cyclic voltammetry, while trace concentrations of As(III) were determined by anodic stripping square wave voltammetry. The method is characterized by a detection limit as low as 5 ng/L (65 pM) after 3 min preconcentration at −0.4 V. Finally, NEEs were applied to trace As analysis in real samples such as certified seawater samples.
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