Extracting Fixed-Order Degradation Kinetics by the Endpoints Method
Extracting Fixed-Order Degradation Kinetics by the Endpoints Method
Consider a degradation reaction that follows fixed-order kinetics, , in which the temperature dependence of the rate constant is characterized by a two-parameter exponential model. In principle, both and the two parameters can be extracted from the concentration of the decaying reactant at the end of three dynamic processes whose temperature history has been accurately recorded. This is done by numerically solving the rate equations for the three processes, with and the temperature-dependence parameters being three unknowns. The concept is demonstrated by generating three endpoints for three histories representing thermal treatments of foods, or storage under fluctuating temperatures, and retrieving the generation parameters.
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