Abstract The graphite electrodes coated with a CNT/asymmetrical N4 tetradentate Schiff base ligand N,N′-bis(pyrrole-2-ylmethylene)-2-aminobenzylamine has been synthesized by condensation of 2-aminobenzylamine and pyrrole-2-caboxaldehyde was investigated as an electrochemical sensor in the simultaneous determination of Pb(II) and Hg(II) in 0.1 M acetate buffer at pH 4.5. The morphology of electrodes surface has been characterized by scanning electron microscopy and electrochemical impedance spectroscopy. The electrochemical response characteristics of the modified electrode towards the Pb(II) and Hg(II) were investigated by SWASV. Detailed experiments were conducted to establish the optimal parameters of deposition and stripping of metal ions, such as supporting electrolytes, pH, deposition time. Linear calibration graph ranging from 3.3–66 nM Pb(II) and Hg(II) metal ions. The LOD were 1.1 nM for Pb(II) and 0.36 nM for Hg(II) (S/N = 3). The novel sensor was successfully applied to determine Pb(II) and Hg(II) in real samples with good recovery.

中文翻译：

---

碳纳米管/不对称新型四齿配体形成复合物在 PIGE 修饰电极上的合成和表征，用于使用阳极溶出伏安法同时测定海水、湖水和井水中的 Pb(II) 和 Hg(II)

摘要 通过 2-氨基苄胺和吡咯-2-羧醛缩合合成了涂覆有 CNT/不对称 N4 四齿席夫碱配体 N,N'-双(吡咯-2-基亚甲基)-2-氨基苄胺的石墨电极，研究如下：一种电化学传感器，用于同时测定 pH 4.5 的 0.1 M 醋酸盐缓冲液中的 Pb(II) 和 Hg(II)。电极表面的形态已通过扫描电子显微镜和电化学阻抗谱表征。SWASV研究了修饰电极对Pb(II)和Hg(II)的电化学响应特性。进行了详细的实验，以确定金属离子沉积和剥离的最佳参数，例如支持电解质、pH 值、沉积时间。范围从 3 的线性校准图。3–66 nM Pb(II) 和 Hg(II) 金属离子。Pb(II) 的 LOD 为 1.1 nM，Hg(II) 的 LOD 为 0.36 nM（S/N = 3）。该新型传感器已成功应用于测定实际样品中的 Pb(II) 和 Hg(II)，回收率良好。