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- Title
Kinetic analysis of the degradation and its color change of cyanidin-3-glucoside exposed to pulsed electric field.
- Authors
Yan Zhang; Xiaojun Liao; Yuanying Ni; Jihong Wu; Xiaosong Hu; Zhengfu Wang; Fang Chen
- Abstract
Abstract??The degradation and its corresponding color change of cyaniding-3-glucoside (Cy-3-glu) exposed to pulsed electric field (PEF) was investigated in the study. In an aqueous-methanol solution of H2O (0.5% TFA) and methanol (MeOH) (7:3, v/v), the degradation of Cy-3-glu, which was exposed to PEF at 1.2, 2.2 and 3.3?kV/cm, was increased as the electric field intensity and the treatment time increased (p<0.05), the degradation kinetics was well fitted to a first order reaction. The degradation kinetic constantkAincreased while the half-lives (t1/2) and decimal reduction time (Dvalues) decreased with an increment of the electric field intensity. PEF had a greater effect on the visual color, lightnessL*value and rednessa*value had a slight increase (changing towards the positive direction) while yellownessb*value and hue angleHvalue presented a significant decrease (changing towards the negative direction) (p<0.05), the total color difference (?E) showed an increase with an increase of the treatment time and the electric field intensity, the change inb*value andHwas well fitted to the first-order reaction. Furthermore, a good positive linear correlation betweenb*value and Cy-3-glu content, their regression coefficients were 0.994, 0.999, and 0.997 at 1.2, 2.2, and 3.0?kV/cm, respectively.
- Subjects
KINETIC theory of matter; ELECTRIC fields; GLUCOSIDES; CARBOHYDRATES
- Publication
European Food Research & Technology, 2007, Vol 224, Issue 5, p597
- ISSN
1438-2377
- Publication type
Article
- DOI
10.1007/s00217-006-0343-8