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Utility of nicotinoyl derivatives in structural studies of mono‐ and diacylglycerols by gas chromatography/mass spectrometry. Part 2
Author(s) -
Zöllner P.,
Lorbeer E.
Publication year - 1995
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.1190300306
Subject(s) - chemistry , mass spectrometry , mass spectrum , electron ionization , alkyl , fragmentation (computing) , gas chromatography , pyridine , chromatography , chloride , double bond , hydrochloride , methylene , medicinal chemistry , stereochemistry , ion , organic chemistry , computer science , ionization , operating system
The positional isomers of mono[( Z )‐9‐octadecenoyl] glycerol, di[( Z )‐12‐octadecadienoyl] glycerol were derivatized with nicotinic acid chloride hydrochloride. The resulting nicotinoyl derivatives were examined by gas chromatography/mass spectrometry. In their electron impact mass spectra, each methylene group and double bond of the alkyl chain is reflected by a fragmentation pattern in the high mass region. This is caused by radical‐induced cleavage of the alkyl chains following random hydrogen abstraction by the pyridine nucleus. An accurate determination of double bond positions in mono‐ and diacylglycerols is possible by characteristic spacings between abundant diagnostic ions in this fragmentation pattern.