【摘要】 在稀H2SO4介质中,采用循环伏安法制备了聚拉莫三嗪膜修饰玻碳电极(PLTG/GCE),将制得的膜修饰电极(PLTG/GCE)在一定电位下选择性预富集Cu(Ⅱ),并用差分脉冲溶出伏安法测定。结果表明,该膜修饰电极对Cu(Ⅱ)的富集作用明显强于裸玻碳电极。对电聚合条件、富集和溶出介质、富集时间及富集电位等实验参数进行了考察,在优化实验条件下,Cu(Ⅱ)的浓度在4.0×10-9～1.3×10-7 mol.L-1范围内与溶出峰电流呈线性关系,相关系数为0.9999,检出限为1.5×10-9 mol.L-1。该修饰电极具有较高的灵敏度和选择性,用于实际水样的分析,平均回收率为98.7%。更多还原

【Abstract】 A glassy carbon electrode modified by poly-lamotrigine(PLTG/GCE) was prepared using cyclic voltammetry in dilute H2SO4 and its electrochemical behavior was investigated in this work.The poly-lamotrigine film as the modifier could attach firmly onto the electrode surface.Copper ions were pre-concentrated selectively with the electrode under a certain reductive potential,and were detected by differential pulse stripping voltammetry.It was found that the modified electrode could capture more Cu(Ⅱ) than the bare electrode.The experimental conditions,such as electrochemical polymerization condition,medium of concentration and stripping,and pre-concentration time and potential were optimized.A good linear relationship was realized between the anodic peak currents of copper and Cu(Ⅱ) concentrations in the range of 4.0×10-9 ~1.3×10-7 mol·L-1with the detection limit of 1.5×10-9 mol·L-1 and a correlation coefficient of 0.9999.The modified electrode demonstrated a high sensitivity and an ideal selectivity,which was successfully applied to the determination of Cu(Ⅱ) in real water samples,and the average recovery was 98.7%.更多还原