Anodic Stripping Voltammetric Determination of Lead(Ⅱ) Using Glassy Carbon Electrode Modified with Novel Calix[4] arene |
| |
摘 要: |
|
关 键 词: | 杯[4]芳烃衍生物 碳电极 方波分析 伏安法 铅离子 电化学分析 |
Anodic Stripping Voltammetric Determination of Lead (II) Using Glassy Carbon Electrode Modified with Novel Calix[4]arene |
| |
Authors: | Lüu Jian‐Quan He Xi‐Wen Zeng Xian‐Shun Zhang Hai‐Li Zhang Zheng‐Zhi |
| |
Abstract: | A new glassy carbon electrode modified with novel calix4]‐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 Pb2+. The modified electrode in 0.1 mol/L HNO3 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 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. |
| |
Keywords: | calix [4] arene derivative glassy carbon electrode square wave voltammetry lead ion |
|