The extraction of vitamin E from rice bran oil deodorizer distillate by low cost with
distillate to acetonitrile ratios of 1:4 w/v by winterization at temperatures of 0 and -20oC
respectively, purified extracted vitamin E by cold saponification. Vitamin E concentration in the
extract was determined using Reversed-phase HPLC. The concentration of extracted vitamin E
was 6,788.186+55.039 mg/kg. The maximum DPPH scavenging effect of 0.1 mg/kg extracted
vitamin E was 98.178±0.004% and significantly (p<0.05) greater than synthetic α-tocopherol,
BHT, TBHQ and BHA respectively. According to the methods of reducing power and ferric
thiocyanate, the extract with vitamin E concentration of 0.1 mg/kg could inhibit the peroxidation
of linoleic more than 90%. The antioxidative properties and superoxide scavenging activity of the
extracted vitamin E was significantly (p<0.05) greater than synthetic α-tocopherol, BHT, TBHQ
and BHA respectively.
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