Development of steryl ester analysis for the detection of admixtures of vegetable oils |
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Authors: | Michael H Gordon Luke A D Miller |
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Affiliation: | (1) Department of Food Science and Technology, The University of Reading, Whiteknights, P.O. Box 226, RG6 6AP Reading, United Kingdom |
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Abstract: | The steryl ester content and composition of 28 samples from 10 vegetable oil types have been determined by isolation of the
steryl esters by high-performance liquid chromatography and analysis by gas chromatography. The oils can be classified into
oils with a high content (>4000 mg/kg) of steryl esters (corn and rapeseed); oils with a medium content (1400–2400 mg/kg)
of steryl esters (sunflower oil and high-oleic sunflower oil); and oils with a low content (<1200 mg/kg) of steryl esters
(safflower, soybean, cottonseed, groundnut, olive, and palm oils). The composition of the steryl ester fraction varies to
a greater extent for different oil types than for different varieties of the same oilseed. The developed method is promising
for authentication of some oils, and is particularly suitable for detecting admixtures of low levels of corn or rapeseed oils. |
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Keywords: | Analysis authentication steryl esters vegetable oils |
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