天然产物研究与开发 ›› 2010, Vol. 23 ›› Issue (6): 1085-1087.

• 开发研究 • 上一篇    下一篇

虾青素的热稳定性及分解动力学

袁 超1*,金征宇2   

  1. 1安阳工学院 生物与食品学院,安阳 455000;2江南大学食品学院,无锡214036
  • 收稿日期:2009-02-13 出版日期:2011-01-10 发布日期:2011-10-19
  • 通讯作者: yuan-chao@163.com

Thermal Stability and Decomposition Kinetic of Astaxanthin

YUAN Chao1* ,JIN Zheng-yu2   

  1. 1School of Biotechnology and Food, Anyang Institute of Technology, Anyang 455000, China; 2School of Food Science and Technology, Southern Yangtze University, Wuxi 214036, China
  • Received:2009-02-13 Online:2011-01-10 Published:2011-10-19

摘要:

用热重/差热分析研究了虾青素的热稳定性,其开始分解温度为250 ℃左右。通过动力学分析确定其活化能为EA=121.14 kJ/mol,指前因子k0=3.25×108/min。对比在有氧和无氧条件下虾青素的热重/差热曲线发现,氧对于虾青素的热分解温度影响不大,但在高温下会生成耐热的降解残余物。

关键词: 虾青素, 热稳定性, 分解动力学, 热重/差热分析, 氧气

Abstract:

The thermal stability of astaxanthin was studied by thermogravimetry/differential thermal analysis and the start decomposition temperature of astaxanthin is about 250 ℃. The thermal decomposition kinetics was investigated, which suggested that the activation energy EA is 121.14 kJ/mol and the pre-exponential factor is 3.25×108/min. The existence of oxygen had little effect for the decomposition of astaxanthin, but some high temperature residues were created.

Key words: astaxanthin, thermal stability, decomposition kinetics, thermogravimetry/differential thermal analysis, oxygen