Laboratory of Interfaces and Advanced Materials (LIMA), FSM, Monastir 5000, Tunisia.
Laboratory of Interfaces and Advanced Materials (LIMA), FSM, Monastir 5000, Tunisia.
Anal Biochem. 2018 Nov 1;560:30-38. doi: 10.1016/j.ab.2018.08.023. Epub 2018 Aug 29.
The electrochemical modification of a glassy carbon electrode using reduced poly-4 nitroaniline (P-4NA) and it's applicability for determination of metallic ions was performed in this study. The electrode modification was performed by cyclic voltammetry in the potential range between 0.9 V and 1.4 V vs Ag/Ag (in 10 mM AgNO) at the scan rate of 100 mV/s by 50 cycles in non-aqueous media. The reduction of nitro groups on the P-4NA modified glassy carbon electrode surface was performed in the potential range between -0.1 V and -0.8 V vs Ag/AgCl(Sat. KCl) at a scan rate of 100 mV/s in 100 mM aqueous HCl solution. The reduced P-4NA glassy carbon surface was modified with the murexide. The affinity of the modified glassy carbon electrode with some metallic ions was investigated by electrochemical impedance spectroscopy method in phosphate buffer solution (pH = 5).
本研究采用还原聚-4-硝基苯胺（P-4NA）对玻碳电极进行电化学修饰，并将其应用于金属离子的测定。通过在非水介质中以 100 mV/s 的扫描速率进行 50 个循环，在 0.9 V 和 1.4 V 与 Ag/Ag（在 10 mM AgNO 中）之间的电位范围内进行循环伏安法对电极进行修饰。在 100 mV/s 的扫描速率下，在 100 mM 盐酸水溶液中，在 -0.1 V 和 -0.8 V 与 Ag/AgCl（饱和 KCl）之间的电位范围内对 P-4NA 修饰的玻碳电极表面上的硝基进行还原。用玫瑰红将还原的 P-4NA 玻碳表面进行修饰。通过在磷酸盐缓冲溶液（pH=5）中采用电化学阻抗谱法研究了修饰玻碳电极与一些金属离子的亲和力。
