Abstract
The effect of sucrose on the oxygen uptake kinetics of ascorbic acid (A) in a closed aqueous system was studied at different temperatures (26.5, 30, and 33 o C) and pH levels (3.0-5.0). The reactions generally followed a pseudo-first-order reaction with respect to dissolved oxygen. The activation energy of A oxidation in sucrose solutions was greater than that in solutions containing no sucrose at all pH levels. Approximately 1 mol of oxygen was used per mole of A at the early stage of the noncatalyzed oxidation of A in various solutions
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