Anodic stripping voltammetric determination of lead (II) using glassy carbon electrode modified with novel calix[4]arene

作者：Lu JQ; He XW^*; Zeng XS; Zhang HL; Zhang ZZ

来源：Chinese Journal of Chemistry, 2003, 21(6): 687-692.

• calix[4]arene derivative
• glassy carbon electrode
• square wave voltarnmetry
• lead ion

A new glassy carbon electrode modified with novel caHx[4]arene derivative was prepared and then applied to the selective recognition of lead ion in aqueous media by cyclic and square wave voltammtry. 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 Pb2+. The modified electrode in 0.1 moVL HNO3 solution showed a linear voltammetric response in the range of 2.0 x 10(-8)-1.0 x 10(-6) mol/L and a detection limit of 6.1 x 10(-9) mol/L. In the modified glassy carbon electrode no significant interference occurred from alkali, alkaline and transition metal ions except Hg2+, Ag+ and Cu2+ ions, which can be eliminated by the addition of KSCN. The proposed method was successfully applied to determine lead in aqueous samples.

• 出版日期2003-6
• 单位南开大学; 湖北师范大学