Journal of the American Oil Chemists' Society

, Volume 80, Issue 8, pp 825–828 | Cite as

Trans FA in sunflower oil at different steps of refining

  • Murat Tasan
  • Mehmet Demirci


The contents of total trans FA of sunflower oils at different stages of refining processes were determined by capillary GLC. The contents of 18∶1, 18∶2, and 18∶3 trans acids were 0.22±0.03, 2.31±0.23, and 0.03±0.01%, respectively, in physically refined sunflower oils, and 0.05±0.01, 0.69±0.26, and 0.02±0.01%, respectively, in chemically refined sunflower oils. The total trans FA contents drastically increased at the end of the physical refining process. The total trans FA contents of chemically refined sunflower oils were <1%. Because of the high temperature applied in the last stage of physical refining, the content of total trans FA was higher than in chemically refined sunflower oils. The last-stage conditions should be carefully evaluated to reduce the formation of trans FA during physical refining.

Key Words

Capillary gas-liquid chromatography chemical refining physical refining sunflower oil trans FA 


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Copyright information

© AOCS Press 2003

Authors and Affiliations

  1. 1.Department of Food Engineering, Tekirdag Agricultural FacultyTrakya UniversityTekirdagTurkey

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