Kinetic Analysis of Anthocyanin Degradation and Polymeric Colour Formation in Grape Juice during Heating


DANISMAN G., ARSLAN E. , Toklucu A.

CZECH JOURNAL OF FOOD SCIENCES, cilt.33, ss.103-108, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 33 Konu: 2
  • Basım Tarihi: 2015
  • Doi Numarası: 10.17221/446/2014-cjfs
  • Dergi Adı: CZECH JOURNAL OF FOOD SCIENCES
  • Sayfa Sayıları: ss.103-108

Özet

The degradation of total monomeric anthocyanins and changes in the proportion of polymeric colour (% PC) as well as antioxidant capacity of grape juice were studied during heating at 70-90 degrees C. Anthocyanin degradation fitted to a first order reaction model, while the formation of % PC followed zero order reaction kinetics. High correlations (r = 0.989-0.997) were found between anthocyanin degradation and % PC formation during heating. The activation energies for the degradation of anthocyanins and formation of % PC were 64.89 and 50.42 kJ/mol, respectively. Trolox equivalents antioxidant capacity (TEAC) values of grape juice slightly changed during heating.