Ultrasonic Degradation Kinetics and Isomerization of 3- and 4-O-Caffeoylquinic Acid at Various Ph: The Protective Effects of Ascorbic Acid and Epigallocatechin Gallate on Their Stability

Caffeoylquinic acids have been found in many plant species with various biological and pharmacological activities. 3- O -caffeoylquinic acid 4- are two isomers of caffeoylquinic acids, which may be degraded processing. The present paper that the stability had decreased increasing solution alkalinity , while was more stable than at same condition. were converted to each other 5- acid. Additionally, ultrasonic effects on degradation isomerization different pH studied. Ultrasound facilitated these compounds. kinetics described by Weibull equation. protective effect ascorbic epigallocatechin gallate also explored. Ascorbic could abate under certain conditions.