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Electrochemical Preparation and Characterization of Neodymium Hexacyanoferrate and Its Application
Author(s) -
Fang Bin,
Shen Rongxing,
Zhang Cuihong,
Yuan Huali,
Yao Li,
Wang Guangfeng
Publication year - 2009
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200900286
Subject(s) - ascorbic acid , cyclic voltammetry , electrochemistry , differential pulse voltammetry , detection limit , fourier transform infrared spectroscopy , electrode , overpotential , materials science , analytical chemistry (journal) , scanning electron microscope , nuclear chemistry , electrocatalyst , chemistry , inorganic chemistry , chemical engineering , chromatography , food science , composite material , engineering
A novel route for the fabrication of neodymium hexacyanoferrate (NdHCF) modified glassy carbon electrodes (GCE) was proposed. The morphological characterization of NdHCF was examined by scanning electron microscopy (SEM) and Fourier transform infrared spectra (FTIR). The performances of the NdHCF/GCE were characterized with cyclic voltammetry and differential pulse voltammograms (DPV). The modified electrode showed excellent electrocatalytic effect and high stability toward the electrochemical oxidation of dopamine (DA) in phosphate buffer solution (pH 5.5) with a diminution of the anodic overpotential of 155 mV. The anodic peak currents increased linearly with the concentration of DA from 5.0×10 −7 to 6.0×10 −4 M with a detection limit of 1.0×10 −8 M ( S / N =3). The most important is that the modified electrode could be used for the determination of DA in the presence of an ascorbic acid concentration as large as 100‐fold that of DA. The proposed method was used to determine DA in DA‐hydrochloride injection and showed excellent sensitivity and recovery. The ease of fabrication, high stability, and low cost of the modified electrode are the promising features of the proposed sensor.