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Characterization of the nonvolatile compounds formed during the thermal oxidation of 1‐linoleyl‐2,3‐distearin: II. The acidic fraction
Author(s) -
Wantland L. R.,
Perkins E. G.
Publication year - 1970
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/bf02532468
Subject(s) - chemistry , saponification , methanol , undecane , fraction (chemistry) , pentane , organic chemistry , chromatography , gas chromatography , hexane , ethanol , thermal oxidation , oxide
Four compounds were isolated from the acidic fraction of 1‐linoleyl‐2,3‐distearin which was heated at 200 C for 24 hr with aeration. Following saponification of the oxidation mixture, the fatty acids were partitioned between ethanol and pentane‐hexane (Skellysolve F). The ethanol soluble acids were subsequently esterified with methanol and subjected to further separation by preparative thin layer and gas liquid chromatography. A combination of chemical and instrumental analyses as well as a comparison with standard compounds was used to determine the structures. Substances characterized were isomeric C 18 aromatic esters, isomeric methyl keto‐octadecanoates, isomeric methyl keto‐octadecenoates and dimethyl undecane‐1,11‐dioate.