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We report on the design of a palladium(II)-selective electrode based on the use of palladium(II) imprinted polymer nanoparticles (IP-NPs), and its application for the anodic stripping deferential pulse voltammetry determination of palladium ions. The IP-NPs were obtained by precipitation polymerization of 4-vinylpyridine (the functional monomer), ethylene glycol dimethacrylate (the cross-linker), 2,2'-azobisisobutyronitrile (the initiator), eriochrome cyanine R (the palladium-binding ligand), and palladium ions (the template ion) in methanol solution. After polymerization, the Pd²⁺ in the polymer nanoparticles were leached out with dilute hydrochloric acid to create cavities for hosting Pd²⁺. The new sensor showed high selectivity for palladium ions in the presence of common potential interferences according to the specific recognition nature of the synthesized imprinted material. A carbon paste electrode was modified …