Ag Nanoparticles Drop-Casting Modification of Screen-Printed Electrodes for the Simultaneous Voltammetric Determination of Cu(II) and Pb(II)

作者：Perez Rafols Clara; Bastos Arrieta Julio; Serrano Nuria; Manuel Diaz Cruz Jose; Arino Cristina; de Pablo Joan; Esteban Miguel

来源：Sensors (Switzerland), 2017, 17(6): 1458.

DOI：10.3390/s17061458

• silver nanoparticles
• screen-printed electrodes
• anodic stripping voltammetry
• metal ions
• nanoparticle drop-casting

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.

• 出版日期2017-6