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Title: EFFECTS OF TOCOPHEROL RATIOS ON OXIDATIVE STABILITY OF SOYBEAN OIL TRIACYLGLYCEROLS

Author
item Warner, Kathleen

Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 5/25/2004
Publication Date: 8/22/2004
Citation: Warner, K.A. 2004. Effects of tocopherol ratios on oxidative stability of soybean oil triacylglycerols. American Chemical Society Abstracts. p. 251.

Interpretive Summary:

Technical Abstract: Effects of tocopherol ratios on oxidative stability of soybean oil triacylglycerols (TAG) were measured after dark oxidation at 60 deg C. Minor constituents were removed from deodorized soybean oil by passing the oil through a column of activated alumina and activated charcoal with ethyl ether, then the TAG was deodorized with no additives. Pure tocopherols were added to the soybean oil TAG in ratios similar to the amounts of the homologues present in common vegetable oils including 500 ppm alpha/50 ppm gamma/20 ppm delta (sunflower oil); 100 ppm alpha/400 ppm gamma/20 ppm delta (canola oil); 100 ppm alpha/400 ppm gamma/20 ppm delta (corn oil); and 100 ppm alpha/400 ppm gamma/200 ppm delta (soy oil). Levels of oxidation in the TAG samples were determined by peroxide development, gas chromatographic headspace volatiles and sensory analyses. TAGs with 400 ppm gamma tocopherol were significantly more stable to oxidation than TAGs with only 50 ppm gamma tocopherol, regardless of the amounts of either alpha or delta tocopherol.