Kinetics of Thermal Degradation of the Anthocyanins Delphinidin‐3‐rutinoside and Malvidin‐3‐glucoside

The kinetics of the thermal degradation of the two anthocyanins delphinidin‐3‐rutinoside and malvidin‐3‐glucoside at 78, 88, 98 and 108 °C, depending on the pH and the type of solvent has been investigated. The first order reaction of delphinidin‐3‐rutinoside and malvidin‐3‐glucoside degradation has been established. The rate constants ( K ± 10 −5 s −1 ), the activation parameters, factor Q 10 and the half‐decay period have been calculated. The rate of delphinidin‐3‐rutinoside degradation is higher than that of malvidin‐3‐glucoside.