Skip to main content
ARS Home » Research » Publications at this Location » Publication #192003
Title: OXIDATIVE STABILITY OF CRUDE MID-OLEIC SUNFLOWER OILS FROM SEEDS WITH HIGH GAMMA AND DELTA TOCOPHEROL LEVELS

Author
item Warner, Kathleen
item Miller, Jerry
item DEMURIN, Y - VNIIMK, KRASNODAR, RUSSIA

Submitted to: Annual Meeting and Expo of the American Oil Chemists' Society
Publication Type: Abstract Only
Publication Acceptance Date: 3/1/2006
Publication Date: 4/30/2006
Citation: Warner, K.A., Miller, J.F., Demurin, Y. 2006. Oxidative stability of crude mid-oleic sunflower oils from seeds with high gamma and delta tocopherol levels [abstract]. 97th Annual Meeting and Expo of the American Oil Chemists' Society. p. 19.

Interpretive Summary:

Technical Abstract: To determine the effects of increasing the level of gamma tocopherol in sunflower oil, sunflowers were developed that contained various levels of gamma tocopherols with corresponding decreases in alpha tocopherol. Mid-oleic sunflower seeds containing various profiles of tocopherols ranging from traditional high alpha, low gamma, low delta to those with high gamma and low alpha were extracted and the crude oil evaluated for oxidative stability. After aging at 60 deg C, oils were measured for peroxide value and hexanal. We found that when the gamma tocopherol content of mid-oleic sunflower oil was increased from its regular level of 20 ppm to 300-700 ppm, the oxidation of the oil was decreased significantly compared to regular low gamma mid-oleic sunflower oil. The modified oils had alpha tocopherol contents of up to 300 ppm without negatively affecting the stability of the oil. An oil with one of the best oxidative stabilities had a tocopherol profile of 470 ppm gamma, 100 ppm delta and 300 ppm alpha indicating that mid-oleic sunflower oil could be more oxidatively stable and be a good source of Vitamin E from alpha tocopherol.