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

Article

Abstract

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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