Electrochemical study of a glassy carbon electrode modified by poly-4-nitroaniline-reduced/murexide and its sensitivity for metal ions.

Autor: Ben Ali Hassine C; Laboratory of Interfaces and Advanced Materials (LIMA), FSM, Monastir 5000, Tunisia. Electronic address: bchedia@yahoo.fr., Barhoumi H; Laboratory of Interfaces and Advanced Materials (LIMA), FSM, Monastir 5000, Tunisia.
Jazyk: angličtina
Zdroj: Analytical biochemistry [Anal Biochem] 2018 Nov 01; Vol. 560, pp. 30-38. Date of Electronic Publication: 2018 Aug 29.
DOI: 10.1016/j.ab.2018.08.023
Abstrakt: 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 3 ) 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).
(Copyright © 2018. Published by Elsevier Inc.)
Databáze: MEDLINE
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