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Enrichment of tocols from rice germ oil using supercritical carbon dioxide
Author(s) -
Ko SoonNam,
Ha TaeYeoul,
In Hong Seung,
Yoon Sung Won,
Lee Junsoo,
Kim Yangha,
Kim InHwan
Publication year - 2012
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.2011.02905.x
Subject(s) - supercritical carbon dioxide , chemistry , residue (chemistry) , carbon dioxide , supercritical fluid , chromatography , nuclear chemistry , organic chemistry
Summary 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 12.4–15.8 MPa, an operating temperature of 40–60 °C and a carbon dioxide flow rate of 5.0 L min −1 . The combination of 13.8 MPa pressure and 60 °C temperature was selected as the most suitable for efficient enrichment of tocols. The level of tocols (1270 mg/100 g) in the residue obtained at these operating conditions was six times higher than the tocols level (192 mg/100 g) 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.