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Characterization of sterols in refined borage oil by GC‐MS
Author(s) -
Wretensjö Inger,
Karlberg Bo
Publication year - 2002
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/s11746-002-0605-4
Subject(s) - campesterol , sterol , chromatography , chemistry , botany , biology , biochemistry , cholesterol
Borage oil sterols were isolated by TLC and characterized using GC and GC‐MS. Several diunsaturated Δ 5 ‐sterols, some of them not previously recorded in vegetable oils, were found. Of these, 24‐methylcholesta‐5,23‐dienol and 24‐ethylcholesta‐5,23‐dienol could be useful markers for borage oil. Two other diunsaturated Δ 5 ‐sterols that are rarely found in vegetable oils, 24‐methylcholesta‐5,24(25)‐dienol and 24‐ethylcholesta‐5,24(25)‐dienol, were identified. The diunsaturated C‐24(28)‐sterol, isofucosterol, was also found, as well as the monounsaturated Δ 5 ‐sterols campesterol and sitosterol. These are normally present in vegetable oils, which makes them unsuitable as markers for borage oil.