Journal
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
Volume 80, Issue 6, Pages 585-589Publisher
AMER OIL CHEMISTS SOC A O C S PRESS
DOI: 10.1007/s11746-003-0742-9
Keywords
barley; cereal grains; corn; milling; rice; soybean; tocol; tocopherol; tocotrienol; wheat
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Tocol levels in the milling fractions of rice, barley, corn, wheat, and soybeans were analyzed by HPLC with a fluorescence detector. Among all milling fractions tested in this study, rice germ had the highest total tocol levels. In the four milling fractions of barley, except pearling flour, all eight tocol isomers were detected, and they were more uniformly distributed than in any other cereal grains measured in this study. The total tocol and alpha-tocopherol levels of wheat germ were significantly (P < 0.05) higher than the other wheat milling fractions. A significantly (P < 0.05) higher proportion of gamma-tocopherol was obtained from corn germ (71.5%) and endosperm (50.3%) than from corn hulls. Only four tocol isomers (alpha-, beta-, gamma-, and delta-tocopherol) were detected in soybean milling fractions; no tocotrienol isomers were detected. The delta-tocopherol level of soybean endosperm, although minor, was significantly higher than those in milling fractions of other cereal grains in this study.
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