Gold Nanoparticles-Modified Screen-Printed Electrode for Determination of Pb(II) Ion Using Linear Sweep Anodic Stripping Voltammetry


A brand new electrochemical sensor based mostly on screen-printed electrode (SPE) gold nanoparticles (AuNPs) has been fabricated for determination of Pb(II) ion by anodic stripping voltammetry in Tris-HCl (pH 5) answer. In this medium, Pb(II) ion was preconcentrated on SPE modified with AuNPs and stripped anodically in linear sweep voltammetry mode, with a peak potential at −0.5 V. The impact of various parameters (pH, supporting electrolyte composition, deposition potential, deposition time, and scan rate) on the sensitivity was studied. Beneath controlled deposition time for 240 s, the detection limit (3 s) was one.three-ng $mathrmml^-1$ Pb(II) and the calibration curve was linear up to 30 $mu $ g $mathrmml^-1$ . The procedure was applied to the determination of Pb(II) ion in faucet water with satisfactory results. The ready modified electrode shows many advantages like high sensitivity, long-time stability, wide linear range, and easy preparation.

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