Stopped-flow kinetic investigation of the oxidation of ascorbic acid by iron(III)benzohydroxamic acid

The fast oxidation of ascorbic acid by Fe(III)benzohydroxamic acid complex [Fe(BHA) 3] has been investigated by the stopped-flow technique in aqueous ethanol medium at three pH values (4.6, 7.0, and 9.0). The reaction exhibits a first-order dependence of rate each on [ascorbic acid] and [Fe(BHA) 3],...

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Bibliographic Details
Published in:Journal of inorganic biochemistry 1996-02, Vol.61 (3), p.155-163
Main Authors: Lakshmi, S., Saravanan, D., Renganathan, R., Velusamy, M.
Format: Article
Language:English
Subjects:
ACIDE ASCORBIQUE
ACIDE HYDROXAMIQUE
ACIDO ASCORBICO
ACIDO HIDROXAMICO
Ascorbic Acid - chemistry
CATION
CATIONES
FER
Ferric Compounds - chemistry
HIERRO
Hydroxamic Acids - chemistry
Kinetics
OXIDACION
Oxidation-Reduction
OXYDATION
Spectrophotometry - methods
Temperature
Time Factors
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Summary:The fast oxidation of ascorbic acid by Fe(III)benzohydroxamic acid complex [Fe(BHA) 3] has been investigated by the stopped-flow technique in aqueous ethanol medium at three pH values (4.6, 7.0, and 9.0). The reaction exhibits a first-order dependence of rate each on [ascorbic acid] and [Fe(BHA) 3], obeying Michaelis-Menton kinetics. The rate of the reaction was found to be pH-dependent.
ISSN:0162-0134
1873-3344
DOI:10.1016/0162-0134(95)00036-4