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The occurrence of methyl methoxystearate isomers in the methyl esters prepared from sheep perinephric fat
Author(s) -
Hansen R. P.,
Smith J. F.
Publication year - 1966
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/bf02532673
Subject(s) - chemistry , adipose capsule of kidney , fatty acid , methanol , lipidology , mass spectrometry , composition (language) , clinical chemistry , organic chemistry , chromatography , biochemistry , biology , linguistics , philosophy , kidney , endocrinology
A fraction has been isolated from sheep perinephric fat and identified by techniques which included mass and infrared spectrometry, as a mixture of the 8 to 14‐methoxyoctadecanoic acid isomers. It is postulated that these isomers are artifacts produced by rigorous esterification with methanol and concentrated H 2 SO 4 of a large sample of sheep perinephric fatty acids which are presumed to have contained trace amounts of constituent hydroxy fatty acids. It is estimated that these methoxystearic acid isomers represented approximately 0.08% of the total weight of fatty acids.