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Degradation Kinetics of Chlorogenic Acid in Honeysuckle during Modified Atmosphere Heat Pump Drying

LUO Lei1, YANG Bin1, ZHANG Guoqing2, ZHU Wenxue1, LIU Yunhong1, WEI Xing2, KANG Xinyan1, QU Zheng1   

  1. 1. College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China;
    2. Sanmenxia Entry-Exit Inspection and Quarantine Bureau, Sanmenxia 472000, China
  • Online:2015-09-15 Published:2015-09-11

Abstract:

This study investigated the changes in chlorogenic acid content and exterior color of honeysuckle during modified
atmosphere heat pump drying experiment. We used nitrogen as drying medium to reduce the oxygen concentration,
considered the influences of drying temperature, loading and oxygen volume fraction on chlorogenic acid content and L
value, and constructed the degradation kinetics model of chlorogenic acid. The results showed that chlorogenic acid content
and L value at the end of drying decreased with increasing temperature, load and oxygen volume fraction. Degradation
kinetics of chlorogenic acid did not follow zero order or first order reaction kinetics. The degradation kinetics model of
chlorogenic acid during modified atmosphere heat pump drying was established through introducing an exponent r related
to time t into the first order reaction kinetics equation. The developed model had better fitting accuracy and could be used to
predict the degradation pattern of chlorogenic acid.

Key words: honeysuckle, modified atmosphere heat pump drying, chlorogenic acid, degradation kinetics

CLC Number: