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Regioselective analysis of triacylglycerols by lipase hydrolysis
Author(s) -
Foglia Thomas A.,
Conkerton Edith J.,
Sonnet Philip E.
Publication year - 1995
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/bf02546199
Subject(s) - lipase , chemistry , rhizopus oryzae , chromatography , hydrolysis , fatty acid , gas chromatography , triacylglycerol lipase , thin layer chromatography , high performance liquid chromatography , organic chemistry , enzyme , fermentation
A modified procedure for the regiospecific analysis of triacylglycerols (TAG) with a 1,3‐specific lipase is described. After partial lipase hydrolysis of the triacylglycerol, the released free fatty acids (FFA) and 1,2(2,3)‐diacylglycerols (DAG) were isolated by thin‐layer chromatography (TLC) and converted to fatty acid methyl esters (FAME). The FAME were analyzed by gas‐liquid chromatography (GLC). The 1,3‐specific lipases used in this study included supported preparations from strains of Mucor miehei and Rhizopus oryzae . The method also was applied to the regiospecific analyses of tung nut and Chinese melon seed oil triacyglycerols, both of which contain high proportions of α‐elaeostearic acid. The TAG composition of the oils was substantiated in parallel analysis of the oils by highperformance liquid chromatography with chemical ionization mass spectrometric detection of intact TAG.