1996
DOI: 10.1016/0022-0728(95)04217-2
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Electrochemical reduction of the final product of vitamin B-6 catabolism: a spectroscopic characterization of the reduced products of 4-pyridoxic acid

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Cited by 9 publications
(7 citation statements)
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“…The electrochemical behavior of 4-pyridoxic acid was different. The cyclic voltammetry and DPV showed only one peak at )1.3 V. This is in agreement with that reported by Pineda et al (49), and was assigned to the reduction of the carboxylic group at the 4-position of the pyridine ring. The electro-oxidation potential for pyridoxamine also was measured at pH 7 employing DPV.…”
Section: Singlet Quenching By Amino Acidssupporting
confidence: 92%
“…The electrochemical behavior of 4-pyridoxic acid was different. The cyclic voltammetry and DPV showed only one peak at )1.3 V. This is in agreement with that reported by Pineda et al (49), and was assigned to the reduction of the carboxylic group at the 4-position of the pyridine ring. The electro-oxidation potential for pyridoxamine also was measured at pH 7 employing DPV.…”
Section: Singlet Quenching By Amino Acidssupporting
confidence: 92%
“…The oxidation of PN at a carbon paste electrode has been firstly examined. Consequently, modification of the glassy carbon electrodes, flow and sequential injection techniques improved speed and selectivity as compared with electrochemical assays [14,[44][45][46]. The chemical structure of all the particular vitamin B 6 forms enables their measurement by electrochemical detection at nanomolar concentrations in endogenous plasma and serum.…”
Section: Introductionmentioning
confidence: 99%
“…The chemical structure of all the particular vitamin B 6 forms enables their measurement by electrochemical detection at nanomolar concentrations in endogenous plasma and serum. It should be mentioned that use of electrochemical detection has been already reported in literature [44][45][46][47][48]. However, such application was limited to samples other than pharmaceuticals and foods.…”
Section: Introductionmentioning
confidence: 99%
“…The reaction was followed by monitoring absorption spectra at pH 6, the initial band centered at 315 nm changes to 356 nm as the lactone is formed [23].…”
Section: Reagentsmentioning
confidence: 99%
“…The electrode processes are pH-dependent due to the complex distribution of species in solution provided by acid-base properties, tautomeric equilibria and, in aldehyde compounds, hydration equilibrium (17)(18)(19)(20)(21)(22)(23)(24)(25). Electrochemical responses indicate the exchange of two or four electrons as well as a distribution of characteristic potentials depending of electroactive group.…”
Section: Introductionmentioning
confidence: 99%