The concentration of tocols from rice bran oil deodorizer distillate using solvent

Soon Nam Ko, Sun Mi Lee, In Hwan Kim

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Tocols (tocopherols + tocotrienols) have been concentrated efficiently from rice bran oil (RBO) deodorizer distillate using solvent at low temperature. The levels of total tocols, total tocopherols, and total tocotrienols in RBO deodorizer distillate (starting material) were 31.5, 14.9, and 16.6 mg/g, respectively. Nine different solvents were tested, and acetonitrile was selected as the optimal solvent for concentrating tocols from the RBO deodorizer distillate. There was a significant (p <0.05) increase in the tocol level of the liquid fractions with decreasing temperature, for incubation temperatures up to -20 °C. In addition, significant differences (p <0.05) were observed in the relative percentages of α-tocopherol, γ-tocopherol, α-tocotrienol, and γ-tocotrienol between the raw sample and liquid fractions obtained at different temperatures using acetonitrile as the solvent. The concentration of the tocols from the RBO deodorizer distillate was temperature dependent, and a maximum of 89.9 mg/g was attained in the liquid fraction at - 40 °C. The relative percentage of tocotrienol homologs in the liquid fraction obtained at - 40 °C was approximately 80%. With acetonitrile as the solvent, the optimal temperature for concentrating the tocols from RBO deodorizer distillate was -20 °C when yield was considered.

Original languageEnglish
Pages (from-to)914-919
Number of pages6
JournalEuropean Journal of Lipid Science and Technology
Volume110
Issue number10
DOIs
Publication statusPublished - 2008 Oct

Keywords

  • Concentration
  • Deodorizer distillate
  • Rice bran oil
  • Solvent
  • Tocols

ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

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