Abstract: A novel electrochemical sensor based on a Pd(II)-imprinted membrane was fabricated on glassy carbon electrode (GCE) by in situ polymerization with Pd(II) as the template, allylurea (NAU) as the functional monomer and ethylene glycol dimethacrylate (EGDMA) as the cross linking agent at the mole ratio of Pd(II), NAU and EGDMA as 1:4:40. Various factors, known to affect the response behavior of selective electrode were investigated and optimized. Under the optimal conditions, the sensor exhibited a good stability, reproducibility and selectivity as well as high sensitivity. A good linearity for the determination of Pd(II) was obtained in the range of 0.25 - 184.0 μmol/L with the detection limit of 8.43 x 10-8 mol/L. The sensor was applied to the determination of Pd(II) in real samples with the relative standard deviation below 4.1 %, and the recovery in the range of 101.4% 105.8 %.
Template and target information: palladium ion, Pd(II)
Author keywords: palladium, Ion-Imprinting Technique, Allylurea (NAU), Electrochemical sensor