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Title: Study of lipids and lipid components in corn dried distiller's grains (DDG)

Author
item Moser, Jill
item Rennick, Kathy
item Vaughn, Steven
item Eller, Fred

Submitted to: Annual Meeting and Expo of the American Oil Chemists' Society
Publication Type: Abstract Only
Publication Acceptance Date: 5/21/2008
Publication Date: 5/21/2008
Citation: Moser, J.K., Rennick, K.A., Vaughn, S.F., Eller, F.J. 2008. Study of lipids and lipid components in corn dried distiller's grains (DDG). Annual Meeting and Expo of the American Oil Chemists' Society.

Interpretive Summary:

Technical Abstract: We extracted oil from corn dried distiller’s grains (DDG) with ethanol, hexane, and supercritical CO2 and found that it has a very large amount of some valuable nutraceutical phytochemicals including phytosterols, ferulate phytosterol esters (FPE), tocopherols, and tocotrienols. The oil fatty acid composition is similar to that of commercial corn oil. The concentration of these phytochemicals in the extracted oils is higher than found in commercial corn oil, which comes from corn germ. In addition, we have used both molecular distillation and silica chromatography (including solid phase extraction and Flash chromatography) to extract these components and to isolate the FPE. The FPE are of particular interest because they have potential for use in foods both as an antioxidant and as a source of phytosterols, a valuable cholesterol-lowering nutraceutical. In addition, these FPE are more stable to high temperatures than FPE from rice bran (oryzanol). The ethanol industry is currently evolving; in an effort to maximize profitability, and to diversify the number of co-products, companies are starting to extract the corn oil either before or after fermentation for use as a biodiesel feedstock. Extracting the phytochemicals in these oils may present yet another valuable co-product from ethanol production.