Journal
SENSORS
Volume 17, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/s17061458
Keywords
silver nanoparticles; screen-printed electrodes; anodic stripping voltammetry; metal ions; nanoparticle drop-casting
Funding
- University of Barcelona
- Spanish Ministry of Economy and Competitiveness (MINECO, Spain) [ENE2014-54299-C2-1-R]
- Generalitat of Catalonia [2014SGR269]
- Spanish Ministry of Economy and Competitiveness
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A new silver nanoparticle modified screen-printed electrode was developed and applied to the simultaneous determination of Pb(II) and Cu(II). Two different types of silver nanoparticles with different shapes and sizes, Ag nanoseeds and Ag nanoprisms, were microscopically characterized and three different carbon substrates, graphite, graphene and carbon nanofibers, were tested. The best analytical performance was achieved for the combination of Ag nanoseeds with a carbon nanofiber modified screen-printed electrode. The resulting sensor allowed the simultaneous determination of Pb(II) and Cu(II) at trace levels and its applicability to natural samples was successfully tested with a groundwater certified reference material, presenting high reproducibility and trueness.
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