摘要
利用分子印迹技术,以3,4-二羟基苯甲酸(3,4-DHBA)作模板分子,通过循环伏安法电聚合吡咯膜(PPy)和随后的定电位过氧化制备了3,4-DHBA-OPPy/GC分子印迹电极。该电极能有效地抑制电化学氧化过程中3,4-DHBA的聚合和同分异构体2,4-二羟基苯甲酸对其测定的干扰。实验结果表明,该修饰电极对3,4-DHBA测定的线性范围为1.0×10-5～1.6×10-3mol/L,检测限为5.0×10-6mol/L。
Molecular imprinted over - oxidized polypyrrole films modified glassy carbon electrode （3, 4 - DHBA - OPPy/GC） was prepared by electrochemical polymerization of pyrrole with the cyclic voltammetry in the presence of template molecule, 3, 4 - dihydrobenzoic acid （3, 4 - DHBA）, and was followed by over - oxidized at 1.3 V in phosphate buffer solution （pH = 9.05）. The modified electrode could successfully avoid the polymerization of oxidized 3, 4 - DHBA and the interference of 2, 4 - DHBA. A linear response curve was obtained from 1.0 x 10^-5 mol/L to 1.6 x 10^-3 mol/L, with the detection limit of 5.0 x 10^-6 mol/L.
出处
《化学传感器》
CAS
2007年第2期31-36,共6页
Chemical Sensors
基金
国家自然科学基金(20503016)
湖南大学生物传感与计量学国家重点实验室开放基金
关键词
3
4-二羟基苯甲酸
2
4-二羟基苯甲酸
分子印迹
聚吡咯
修饰电极
3, 4 - dihydrobenzoic acid
2, 4 - dihydrobenzoic acid
molecular imprinted polymers （MIP）
polypyrrole
modified - electrode
