In this work, a novel carbon paste electrode was modified with metal-organic framework (MOF) 235for detecting lead ions in aqueous solutions using anodic redissolution voltammetry as analyticaltechnique. Experimental parameters such as, amount of MOF-235, type of supporting electrolyte,potential and time deposition were evaluated to optimize the detection approach. The Pb2+ detectionresponse of this MOF-modified electrode allowed to achieve a detection limit of about 18 μg L-1 with acorrelation coefficient (R2) of about 0.9962, extending in a linear concentration range from 50 to 300μg L-1. Drinking water samples (as-received or spiked with well-known lead concentration) wereanalyzed to determine the concentration of lead ions. Data were also confirmed by Atomic AbsorptionSpectroscopy (AAS). Furthermore, the electrochemical determination when compared with the AAS,has shown that the electroanalytical approach represents a fast and quite reliable alternative formonitoring heavy metals.
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