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Partial separation of polyunsaturated fatty acid esters from FAMEs mixtures by adsorption on silver nitrate‐impregnated silica gel
Author(s) -
Ghebreyessus Kesete Y.,
Schiltz Holly,
Angelici Robert J.
Publication year - 2006
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-006-1252-5
Subject(s) - adsorption , chemistry , polyunsaturated fatty acid , silver nitrate , hexane , silica gel , chromatography , linolenate , soybean oil , fatty acid , nuclear chemistry , organic chemistry , food science
Mixtures of FAMEs derived from soybean and canola oils were fractionated by contacting their hexane solutions with AgNO 3 /SiO 2 adsorbents. Methyl linolenate (18∶3) adsorbed most strongly, followed by methyl linoleate (18∶2), on the AgNO 3 /SiO 2 . Conditions of the extractions (AgNO 3 loading, amount of adsorbent, methyl soyate/hexane solution concentration, use of successive extractions, and methods of adsorbent regeneration) were varied. Under optimal conditions, the 7.0% of 18∶3 in methyl soyate could be reduced to 0.1%. The described process is a simple method for separating a FAMEs mixture into a fraction that is depleted in polyunsaturated FAMEs and one that is enriched.