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Mass spectra of the picolinyl esters of isomeric mono‐ and dienoic fatty acids
Author(s) -
Christie W. W.,
Brechany E. Y.,
Holman R. T.
Publication year - 1987
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02533983
Subject(s) - chemistry , double bond , mass spectrum , methylene , mass spectrometry , electron ionization , medicinal chemistry , organic chemistry , methyl oleate , chromatography , catalysis , ion , ionization
The picolinyl ester derivatives of the complete series of isomeric octadecenoates, methylene‐interrupted octadecadienoates, and of octadec‐9‐ynoate have been subjected to gas chromatography‐mass spectrometry. A fused‐silica capillary column, coated with a cross‐linked methyl silicone, was used for the separation. Electron impact spectra were determined at 70 eV. Earlier observations with a limited series of model compounds were confirmed, and it was shown that the picolinyl ester derivatives were of almost universal value in the location of double bonds in such isomers. Difficulties of interpretation arose mainly when the double bonds were close to the carboxyl group.