Enrichment of tocols from rice germ oil using supercritical carbon dioxide

Soon Nam Ko, Tae Yeoul Ha, Seung In Hong, Sung Won Yoon, Junsoo Lee, Yangha Kim, In-Hwan Kim

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7 Citations (Scopus)


An efficient process was developed for enrichment of tocols from rice germ oil (RGO) using supercritical carbon dioxide (SC-CO 2). Tocols were efficiently enriched in residue by removal of fatty acid methyl ester from the esterified RGO using SC-CO 2. The enrichment of tocols was carried out at an operating pressure of 12.4-15.8MPa, an operating temperature of 40-60°C and a carbon dioxide flow rate of 5.0Lmin -1. The combination of 13.8MPa pressure and 60°C temperature was selected as the most suitable for efficient enrichment of tocols. The level of tocols (1270mg/100g) in the residue obtained at these operating conditions was six times higher than the tocols level (192mg/100g) of the starting material, namely esterified RGO. There were no significant differences in relative percentages of tocols homologues between esterified RGO and the residue obtained by SC-CO 2 extraction.

Original languageEnglish
Pages (from-to)761-767
Number of pages7
JournalInternational Journal of Food Science and Technology
Issue number4
Publication statusPublished - 2012 Apr 1



  • Enrichment
  • Rice germ oil
  • Supercritical carbon dioxide
  • Tocols
  • Tocopherol
  • Tocotrienol

ASJC Scopus subject areas

  • Food Science
  • Industrial and Manufacturing Engineering

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