摘要
利用循环伏安法制备银掺杂聚L-天冬氨酸化学修饰电极.用循环伏安法研究对氨基苯酚在该电极上的电化学行为,建立测定对氨基苯酚的新方法.在pH=5.5的磷酸盐缓冲溶液中,对氨基苯酚在银掺杂聚L-天冬氨酸修饰电极上产生一对灵敏的氧化还原峰,峰电位分别为Epa=203 mV,Epc=129 mV(相对Ag/AgCl电极).用循环伏安法(CV)进行测定,氧化峰峰电流与对氨基苯酚的浓度分别在8.00×10-7～1.00×10-4 mol/L和1.00×10-4～5.00×10-4 mol/L范围内呈线性,检出限为1.0×10-7 mol/L.对5.0×10-5 mol/L对氨基苯酚溶液平行测30次,其相对标准偏差为6.9%,用于废水中对氨基苯酚的测定,结果满意.
A silver doped poly（L-aspartic acid） modified electrode was prepared through cyclic voltammetry.The electrochemical behavior of p-aminophenol at the modified electrode was studied.A novel method for determination of p-aminophenol using cyclic voltammetry was established.In pH=5.5 phosphate buffer solution,p-aminophenol gave an anodic peak at the modified electrode.The peak potential were Epa=203 mV and Epc=129（υs Ag/AgCl）.The anodic peak current versus the concentration of p-aminophenol showed a linear relations over the range of 8.00×10^-7～1.00×10^-4 mol/L and 1.00×10^-4～5.00×10^-4 mol/L.The detection limit was 1.00×10^-7 mol/L.The relative standard deviation was 6.9%（n=30,5.0×10^-5 mol/L p-aminophenol）.The method has been applied to the determination of p-aminophenol with satisfactory results.
出处
《淮北煤炭师范学院学报（自然科学版）》
2010年第4期32-35,共4页
Journal of Huaibei Coal Industry Teachers College(Natural Science edition)
基金
安徽省高校省级自然科学研究重点项目(KJ2008A122)
作者简介
赵丽（1964-），女，河南焦作人，副教授，研究方向：分析化学．
通讯作者：孙登明
