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Thermal oxidation of phospholipids 1,2‐dipalmitoyl‐ sn ‐glycerol‐3‐phosphoethanolamine
Author(s) -
Jewell N. E.,
Nawar W. W.
Publication year - 1980
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/bf02678923
Subject(s) - phospholipid , glycerol , chemistry , amine gas treating , chromatography , thermal oxidation , gas chromatography , thin layer chromatography , organic chemistry , layer (electronics) , biochemistry , membrane
The purpose of this study was to compare thermal oxidation of phospholipids with that of triglycerides. Two simple saturated sys‐tems were chosen: 1, 2‐dipalmitoyl‐ sn ‐glycerol‐3‐phosphoethanolamine and tripalmitoylglycerol. Samples were heated at 150 C for 1 hr in air and the resulting volatile compounds analyzed qualitatively and quantitatively. Alkanes, ketones and lactones were major products in both cases. However, qualitative and quantitative differences were observed. Alkanals were absent in the oxidized phospholipid. This apparently is largely due to their reaction with the amine group as evidenced by thin layer chromatography. In addition, the phospholipid produced 2‐pentanol, 2‐methyl‐l‐pro‐panol and ethyl hexadecanoate; smaller amounts of hydrocarbons and methyl ketones than with the triacylglycerol; and no 1‐alkanols. Mechanisms which could be responsible for these observations are proposed.