Direct As(V) Determination Using Screen-Printed Electrodes Modified with Silver Manoparticles
Carbon-nanofiber-based screen-printed electrodes modified with silver nanoparticles (Ag-NP-SPCNFEs) were tested in a pioneering manner for the direct determination of As(V) at low µg L–1 levels by means of differential pulse anodic stripping voltammetry. Screen-printed electrodes were modified with...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/332392 |
| Acceso en línea: | https://hdl.handle.net/2117/332392 https://dx.doi.org/10.3390/nano10071280 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanoparticles Electrochemistry Arsenic determination Silver nanoparticles Anodic stripping voltammetry Screen-printed electrodes Water analysis Nanopartícules Arsenic -- AnalisI Electroquímica Àrees temàtiques de la UPC::Enginyeria química |
| Sumario: | Carbon-nanofiber-based screen-printed electrodes modified with silver nanoparticles (Ag-NP-SPCNFEs) were tested in a pioneering manner for the direct determination of As(V) at low µg L–1 levels by means of differential pulse anodic stripping voltammetry. Screen-printed electrodes were modified with two different types of Ag-NPs, nanoseeds (NS), and nanoprisms (NPr) and characterized both microscopically and electrochemically. Furthermore, after optimizing the direct voltammetric determination of As(V), the analytical performance of considered sensors was compared for the direct determination of As(V). These results suggest that Ag-NS offer a better analytical response compared to Ag-NPr, with a detection and quantification limit of 0.6 and 1.9 µg L–1, respectively. The proposed methodology was validated using a spiked tap water sample with a very high reproducibility and good agreement with inductively coupled plasma - mass spectrometry (ICP-MS) measurements |
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