Wang Sheng-Fu, Xu Qiao
Faculty of Chemistry and Material Science, Hubei University, Wuhan 430062, People's Republic of China.
Bioelectrochemistry. 2007 May;70(2):296-300. doi: 10.1016/j.bioelechem.2005.12.005. Epub 2006 May 23.
In this paper, some electrochemical parameters of ethamsylate at a multi-walled carbon nanotube modified glassy carbon electrode, such as the charge number, exchange current density, standard heterogeneous rate constant and diffusion coefficient, were measured by cyclic voltammetry, chronoamperometry and chronocoulometry. The modified electrode exhibits good promotion of the electrochemical reaction of ethamsylate and increases the standard heterogeneous rate constant of ethamsylate greatly. The differential pulse voltammetry responses of ethamsylate were linearly dependent on its concentrations in a range from 2.0 x 10(-6) to 6.0 x 10(-5) mol L(-1), with a detection limit of 4.0 x 10(-7) mol L(-1).
本文采用循环伏安法、计时电流法和计时库仑法，测定了酚磺乙胺在多壁碳纳米管修饰玻碳电极上的一些电化学参数，如电荷数、交换电流密度、标准异相速率常数和扩散系数。修饰电极对酚磺乙胺的电化学反应具有良好的促进作用，极大地提高了酚磺乙胺的标准异相速率常数。酚磺乙胺的差分脉冲伏安响应在2.0×10⁻⁶至6.0×10⁻⁵ mol·L⁻¹范围内与其浓度呈线性关系，检测限为4.0×10⁻⁷ mol·L⁻¹。
