Food Science and Technology Research
Online ISSN : 1881-3984
Print ISSN : 1344-6606
ISSN-L : 1344-6606
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Effect of Tocopherols and Phytosterol on Color Reversion of MCT
Yuquan ZHANGXuebing XUYuanrong JIANGXingguo Wang
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2013 Volume 19 Issue 6 Pages 1127-1131

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Abstract

Tocopherols and phytosterols were added to medium chain triacylglycerol (MCT) to study their effect on color reversion of vegetable oils. Four samples with 0, 6,000, 10,000 and 14,000 mg/kg phytosterols were heated at 105°C for 12 h. No significant reduction of phytosterols and obvious color change were found in the four samples. Five samples with 0, 1,000, 2,000, 5,000, 10,000 mg/kg tocopherols were also heated at 105°C for 12 h. About 2 − 5% tocopherols were absent after heating. Reduction of total tocopherol was found linearly related to color darkening. The most significant reduction is α-tocopherol. Reduction of α-tocopherol correlated more with color darkening than that of γ-tocopherol. The conclusion is phytosterol has no effect on color reversion of oils and reduction of α-tocopherol was attributed to be the most important cause of color reversion.

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© 2013 by Japanese Society for Food Science and Technology
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