新型超支化聚合物修饰碳糊电极的制备及应用  

Preparation and Application of the Hyperbranched Polymer Modified Carbon Paste Electrode

作　　者：周长利[1] 郑玉欣[1] 陈洪伟[1] 寿崇琦[1] 董艳敏[1] 刘震[1] 陈立仁[2] 

机构地区：[1]济南大学化学化工学院,济南250022 [2]中国科学院兰州化学物理研究所,兰州730000

出　　处：《分析化学》2009年第1期111-114,共4页Chinese Journal of Analytical Chemistry

基　　金：山东省教育厅科技开发项目(No.J02C07);山东省重点学科基金(No.XTD0705)资助项目

摘　　要：制备了超支化聚(胺-酯)化学修饰碳糊电极,研究了Cu2+在修饰电极上的电化学行为。在0.25mol/LKCl溶液(pH4.0)中,Cu2+与超支化聚(胺-酯)形成电化学包络物,分别于0.27和0.06V处产生一对灵敏的氧化还原峰,具有明显的催化还原增敏作用。研究了超支化聚合物结构和代数对电极性能的影响。实验表明:5代超支化聚合物修饰电极性能最好。建立了线性扫描伏安法测定痕量铜的方法,线性范围1.0×10-8～3.0×10-5mol/L;检出限为4.0×10-9mol/L。用于人发样品的测定,获得满意结果。Hyperbranched polymer modified carbon paste electrodes（HBP/CPE） were prepared. The electro- chemical behavior of Cu （ Ⅱ ） on the HBP/CPE electrode was studied. In the solution of 0.25 mol/L KC1 （pH 4.0） , an electroactive complex of Cu （ Ⅱ ） with poly （amine-ester） was formed and produced a redox peak at 0.27 V and 0.06 V. The HBP/CPE electrode showed good catalytic activity and sensitizing effect for the reduction of Cu （ Ⅱ ） in the KCl solution. The investigation of the effect of structure and generation number of hyperbranched polymer on the capability of modified electrode indicates that HBP5/CPE electrode was the highest sensitizing effect. The detection limit and the linear range of the concentration of Cu（ 1~ ） to the reduc- tion peek current were 4.0 × 10^-9 mol/L and 1.0 ×10^-8 _ 3.0 ×10-5 mol/L, respectively. Linear sweep voltammetry has been applied to the determination of micro Cu （ Ⅱ ） in human hair with satisfactory results.

关 键 词：超支化聚合物 化学修饰电极 铜 

分 类 号：O657.1[理学—分析化学] O633.14[理学—化学]