Influence of buffer pH value on L-ascorbic acid oxidation rate
2000
Kolarov, Lj.A. | Petrovic, S.M. | Ciric, G. (Univerzitet u Novom Sadu, Novi Sad (Yugoslavia). Tehnoloski fakultet)
The L-ascorbic acid oxidation rate has been observed by recording the UV absorption spectra of thermostated solution of L-ascorbic acid in buffers with different pH values: acetate (4-6), phosphate (5-8) and universal (4-10). A simple form of the higher and fractional orders equation has been derived. It is possible, by using computer programmes, calculation of reaction order (n) and reaction rate constant (kA). The fractional reaction orders have been calculated for L-ascorbic acid oxidation. The relation between the values of L-ascorbic acid oxidation rate constant and the buffer pH value is linear and has been expressed in the equation.
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