Anodic Stripping Voltammetric Determination of Lead (II) Using Glassy Carbon Electrode Modified with Novel Calix[4]arene

Abstract

Abstract A new glassy carbon electrode modified with novel calix[4]‐arene derivative was prepared and then applied to the selective recognition of lead ion in aqueous media by cyclic and square wave voltammetry. A new anodic stripping peak at − 0.92 V (vs. Ag/Ag + ) in square wave voltammogram can be obtained by scanning the potential from − 1.5 to − 0.6 V, of which the peak current is proportional to the concentration of Pb 2+ . The modified electrode in 0.1 mol/L HNO 3 solution showed a linear voltammetric response in the range of 2.0 × 10– 8 –1.0 × 10– 6 mol/L and a detection limit of 6.1 × 10– 9 mol/L. In the modified glassy carbon electrode no significant interference occurred from alkali, alkaline and transition metal ions except Hg 2+ , Ag + and Cu 2+ ions, which can be eliminated by the addition of KSCN. The proposed method was successfully applied to determine lead in aqueous samples.