A wheat bran oily extract obtained with supercritical carbon dioxide at 25.0 0.1 MPa
and 40 2 C has been analyzed in order to determine some valuable bioactive compounds as
alkylresorcinols, -linolenic acid, steryl ferulates, tocopherols and phenolic compounds, which levels
were around 47, 37, 18, 7 and 0.025 mg/g oily extract, respectively. To our knowledge, this is the
first time that the presence of steryl ferulates has been observed in a supercritical fluid extract of
wheat bran and that
-tocopherol has been described in wheat bran oily extracts. Other common
quality parameters, directly correlated with oxidative degradation, were also evaluated. Acidity
values around 15% oleic acid were detected, while low levels of hydroperoxides (around 2.4 meq
O2/kg) and very low levels of hexanal (0.21 ppb) were found. Composition of the wheat bran oily
extract was stable during 155 days of storage at 21 C and darkness, and only a slight decrease in
alkylresorcinols and tocopherols contents (13% and 20%, respectively) was observed. These results
indicated an attractive potential of the obtained oily extract for industrial applications as food
ingredients, nutraceuticals, and others.
