Abstract
The production of blue pigments in the early stage of a Maillard reaction between d-xylose and glycine was kinetically analyzed to be associated with the mechanism for polymerization. An ion-pairing and reversed-phase HPLC method was developed for quantitatively tracing the blue pigment formation. The experiment with varied composition revealed that the reaction obeyed the following relationship: v =s k [d-xylose]2 · [glycine]2This equation could also be derived according to the stationary state theory. Based on Arrhenius plots, the activation energy was found to be 17.5 kcal/mol. The application of the transition state theory provided — 17.4cal/deg/mol for the activation entropy. A reaction scheme for the production of blue pigments is proposed on the basis of this kinetic analysis.
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