中文摘要：

采用脱氢枞胺基希夫碱和多壁碳纳米管复合材料修饰玻碳电极,以循环伏安法和示差脉冲阳极溶出伏安法研究此修饰电极的导电性能,及Pb2＋在此电极上的电化学行为。结果表明,修饰电极在0.2 mol/L HAc-NaAc缓冲体系（pH 5.5）中,于-1.1 V下沉积250 s,Pb2＋在1.0×10-8～1.0×10-6 mol/L范围内与溶出峰电流呈良好的线性关系,线性回归方程为I（μA）=6.6173C（μmol/L）＋0.2597（R=0.9971）,检出限为5.0×10-9 mol/L （S/N=3）。将此修饰电极用于水样品中Pb2＋检测,结果令人满意。本方法操作简便,耗时短,具有很好的准确性、灵敏度和选择性,实现了水样中低浓度铅的准确、快速测定。

英文摘要：

A novel electrochemical method based on dehydroabietylamine schiff base（ DBS） and multi-walled carbon nano-tubes（ MWCNTs） composite modified glassy carbon electrode was presented for determination of Pb2＋. The electrochemical behaviors of Pb2＋on the modifled electrode were investigated by cyclic voltammetry （ CV） and differential pulse anodic stripping voltammetry （ DPASV ） . The results showed that under the optimized conditions including 0 . 2 mol/L NaAc-HAc used as supporting buffer （ pH 5 . 5 ） , -1 . 1 V of accumulating potential, 250 s of accumulating time, the oxidation peak current was proportional to Pb2＋concentration in the range between 1 × 10-8 mol/L and 1 × 10-6 mol/L with the linear regression equation as I（μA）= 6. 6173c（μmol/L）＋0. 2597（R=0. 9971） and the detection limit as 5. 0×10-9 mol/L （S/N=3）. The proposed sensor was successfully employed to determine Pb2＋ in real samples with satisfactory results. In addition, this method showed the advantages of simple operation, short assay time, good accuracy, satisfactory efficiency and good selectivity for determination of low concentration lead in water samples.