文摘
Fe/Al-layered double hydroxide (Fe/Al-LDH) was synthesized on a glassy carbon electrode (GCE) by a novel and simple electrochemical method. The electrochemical characterization of Fe/Al-LDH deposited on GCE was investigated in a 0.1 M NaOH solution. Moreover, the LDH film obtained was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and energy dispersive X-ray (EDX). The obtained results showed that Fe/Al-LDH was generated on GCE by the electrochemical method, and that the obtained film was highly pure. The electrochemical behavior of isonicotinic acid hydrazide or isoniazid (INZ) at LDH/GCE was studied by the electrochemical techniques including cyclic voltammetry, differential pulse voltammetry, and amperometry. The obtained results indicated an excellent electrocatalytic reduction activity for the Fe/Al-LDH-modified GCE of INZ. Under the optimized conditions for determination of INZ the calibration curves are linear in the ranges of 4.9–650.0 and 4.9–770.0 μM with limit of detections of 4.0 and 7.0 μM for differential pulse voltammetry, and amperometry techniques, respectively. The proposed method was performed successfully the analysis of INZ in commercial drugs.