多壁碳纳米管修饰碳纤维微电极对肾上腺素的电催化作用

Electrocatalytic activity of Multi-Walled carbon nanotubes modified carbon fiber microelectrode for epinephrine

利用循环伏安法（CV）研究了多壁碳纳米管修饰碳纤维微电极（MWNT／CF）对肾上腺素（Ep）的电催化作用，详细讨论了电催化反应的最佳条件．实验表明，在0．5mol／L H2SO4溶液中，Ep的浓度在4．6×10^-4mol／L～9．1×10^-7mol／L范围内，氧化峰电流与浓度成良好的线性关系，检测限为9．1×10^-8mol／L．将该修饰电极用于盐酸肾上腺素针剂的测定，8次平行样品测定结果的相对标准偏差为1．5％，回收率为97．0％～107．1％．

The electro-catalysis of carbon fibre microelectrode modified with Multi-wall carbon nanotubes（MWNT/CF） on Epinephrine（Ep） was studied by cyclic voltammetry, and good conditions of electrocatalytic reaction were discussed particularly. In a medium of H2SO4 solution, the oxidation currents were linear for concentration of Ep in the range of 4.55×10^4 mol/L-9.1 ×10^-7 mol/L, with detection limit of 9.1×10^8 mol/L. The MWNT/CF had been used to determine the contents of adrenaline hydrochloride injection with RSD（n=8） 1.5% and recovery rate in the range of 97.1%～ 107.1%.