FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (23): 15-19.doi: 10.7506/spkx1002-6630-201323004

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The stability of lutein in organic solvents

PANG Hui-li1,LI Da-jing1,2,*,LIU Chun-quan2,3   

  1. 1. College of Forestry, Northeast Forestry University, Harbin 150040, China;2. Institute of Farm Product Processing, Jiangsu
    Academy of Agricultural Sciences, Nanjing 210014, China;3. Engineering Research Centre for Agricultural Products Processing,
    National Agricultural Science and Technology Innovation Centre in East China (Jiangsu), Nanjing 210014, China
  • Received:2013-07-16 Revised:2013-11-05 Online:2013-12-15 Published:2014-01-03
  • Contact: LIU Chun-quan E-mail:lcq@js001.com.cn

Abstract:

The HPLC analysis method of lutein was carried out to monitor variations of lutein in original solvents to know the effects of the solvents, oxygen and temperature on the stabilities of lutein, which can provide some instruction to the extraction of lutein and the production of lutein-based formulations. The variations of lutein in ethanol, ethyl acetate, tetrahydrofuran and toluene at 30, 40, 50℃ was analysised by C30-HPLC-DAD, and then the rate constants were calculated respectively. The stabilities of lutein at the same temperature normally was ethanol > ethyl acetate> tetrahydrofuran > toluene. The rentention of all-(E)-lutein decreased during the heating treatment and the rentention of its cis isomers increased firstly and then decreased slowly. Higher stabilities were found in nitrogen-bubbled condition, especially for tetrahydrofuran. All-(E)-lutein was less stable as a function of temperature and it was more easy to its isomerization reaction. The thermal degradation of all-(E)-lutein followed a first-order kinetic model.

Key words: lutein, retention, organic solvent, stability

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