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Electrochemical and Spectroelectrochemical Studies on Pyridoxine Hydrochloride Using a Poly(methylene blue) Modified Electrode
Author(s) -
Tan Liang,
Xie Qingji,
Yao Shouzhuo
Publication year - 2004
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.200302993
Subject(s) - methylene blue , electrochemistry , cyclic voltammetry , electrode , chemistry , horizontal scan rate , detection limit , inorganic chemistry , adsorption , redox , pyridoxine hydrochloride , nuclear chemistry , pyridoxine , catalysis , organic chemistry , chromatography , photocatalysis , biochemistry
The electrochemical redox processes of pyridoxine hydrochloride (VB 6 ) at a poly(methylene blue) film modified glass carbon electrode (PMBE) in a phosphate buffer solution (PBS, pH 8.0) were studied by cyclic voltammetry. The VB 6 electrode reaction with quasi‐reversible characteristics was diffusion‐controlled at low scan rates and adsorption‐controlled at high scan rates. The anodic peak current positive to 0.6 V (vs. SCE) was found to be proportional to the concentration of VB 6 in the range of 0.010 to 1.03 mg⋅mL −1 with a detection limit of 1.34 μg mL −1 . Fluorescence and UV‐vis absorption spectroelectrochemical measurements suggest that the pyridine ring was not destroyed over the potential range from −0.8 to 1 V (vs. SCE), and the electrocatalytic generation of pyridoxal was anodically started at 0.57 V.