Mass Spectra of the Picolinyl Esters of Isomeric Mono- and Dienoic Fatty Acids

Overview

Journal Lipids

Specialty Biochemistry

Date 1987 Apr 1

PMID 3600199

Citations 19

Authors

W W Christie

E Y Brechany

R T Holman

Affiliations

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Abstract

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.

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References

Christie W, Brechany E, Johnson S, Holman R . A comparison of pyrrolidide and picolinyl ester derivatives for the identification of fatty acids in natural samples by gas chromatography-mass spectrometry. Lipids. 1986; 21(10):657-61. DOI: 10.1007/BF02537217. View

Valicenti A, Pusch F, Holman R . Synthesis of octadecynoic acids and [1-14C] labeled isomers of octadecenoic acids. Lipids. 1985; 20(4):234-42. DOI: 10.1007/BF02534194. View