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.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
超支化聚合物
化学修饰电极
铜
Hyperbranched polymer, chemically modified electrode, copper
