Degradation Kinetics of Anthocyanin in Blueberry Juice during Thermal Treatment
2010/01/08 by Carolina Pereira Kechinski, Pâmela Virgínia Ramos Guimarães, Caciano Pelayo Zapata Noreña +2 · 24 citations
Medicine · Agricultural and Biological Sciences · Chemistry · #Phytochemicals and Antioxidant Activities #Fermentation and Sensory Analysis #Free Radicals and Antioxidants
paper · doi:10.1111/j.1750-3841.2009.01479.x
Abstract
The kinetics of anthocyanin degradation in blueberry juice during thermal treatment at 40, 50, 60, 70, and 80 degrees C were investigated in the present study. Anthocyanin degradation was analyzed up to the level of 50% retention using a pH differential method. The degradation of anthocyanin at each temperature level followed a first-order kinetic model, and the values of half-life time (t(1/2)) at temperatures of 40, 50, 60, 70, and 80 degrees C were found to be 180.5, 42.3, 25.3, 8.6, and 5.1 h, respectively. The activation energy value of the degradation of the 8.9 degrees Brix blueberry juice during heating was 80.4 kJ.mol(-1). The thermodynamic functions of activation (DeltaG, DeltaH, and DeltaS) have been determined as central to understanding blueberry degradation.
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