β-carotene in sunflower oil oxidation

Authors

  • N. V. Yanishlieva Institute of Organic Chemistry, Bulgarian Academy of Sciences
  • V. G. Raneva Institute of Organic Chemistry, Bulgarian Academy of Sciences
  • E. M. Marinova Institute of Organic Chemistry, Bulgarian Academy of Sciences

DOI:

https://doi.org/10.3989/gya.2001.v52.i1.390

Keywords:

β-Carotene, Oxidation, Sunflower oil

Abstract


The oxidation kinetics of sunflower oil (SO), as well as of pure triacylglycerols of sunflower oil (TGSO) in the presence of different concentrations (0.001-0.02 %) β-carotene was studied. The process was performed at high (kinetic regime) and low (diffusion regime) oxygen concentrations at room temperature in the dark and under daylight. The results from the oxidation of SO and TGSO at 100ºC in the presence of β-carotene were also presented. It was established that in the antioxidant-free lipid system, the β-carotene did not give any antioxidative protection. It worked as a prooxidant during the oxidation at room temperature and at sufficiently high oxygen concentration, the effect being more pronounced in the dark than under daylight. β-carotene increased the stability of tocopherol-containing SO during its oxidation at room temperature and under daylight. This effect is more strongly expressed in a kinetic regime of oxidation. The synergism of β-carotene with the tocopherols was characterized by the stabilization factor F and the activity A. In the kinetic regime of oxidation F and A varied in the interval F=2.0-6.3, and A =2.7-21.0. In the diffusion regime F=1.3-1.5, and A=1.5-2.8.

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Published

2001-02-28

How to Cite

1.
Yanishlieva NV, Raneva VG, Marinova EM. β-carotene in sunflower oil oxidation. grasasaceites [Internet]. 2001Feb.28 [cited 2021Dec.9];52(1):10-6. Available from: https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/390

Issue

Section

Research