电致二茂铁催化鲁米诺化学发光研究

STUDY ON OXIDIZED FERRONCENE AS CATALYST FOR THE ELECTROCHEMILUMINESCENT OXIDATION OF LUMINOL

在电极氧化作用下，二茂铁对鲁米诺-过氧化氢化学发光有催化作用。考察了在不同电极电位下，鲁米诺一过氧化氢一二茂铁体系的电化学发光行为，研究了影响发光信号的各种因素．优化分析体系并探讨其检测机理，构建具有高分析性能的电化学发光分析系统。结果表明．羧基二茂铁浓度为1×10^-8～1×10^-4molL^-1时与电化学强度呈线性响应关系，检出限为2．4×10^-9mol L^-1。

Electrochemically oxidized ferroncene was investigated as catalyst for the chemiluminescent oxidation of luminol by hydrogen peroxide. As the result of the redox state of ferrocene regulated by electrode protential, chemiluminescence response can be controlled electrochemically. The test conditions are optimized and the analysis mechnism is discussed. The system exhibits a wide linear calibration range （from 1×10^-8 to 1×10^-4 mol L^-1） with a detection limit of 2.4×10^-9 mol L^-1.