کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1251956 | 1496313 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A detailed identification study on high-temperature degradation products of oleic and linoleic acid methyl esters by GC–MS and GC–FTIR A detailed identification study on high-temperature degradation products of oleic and linoleic acid methyl esters by GC–MS and GC–FTIR](/preview/png/1251956.png)
GC–MS and GC–FTIR were complementarily applied to identify oxidation compounds formed under frying conditions in methyl oleate and linoleate heated at 180 °C. The study was focused on the compounds that originated through hydroperoxide scission that remain attached to the glyceridic backbone in fats and oils and form part of non-volatile molecules. Twenty-one short-chain esterified compounds, consisting of 8 aldehydes, 3 methyl ketones, 4 primary alcohols, 5 alkanes and 1 furan, were identified. In addition, twenty non-esterified volatile compounds, consisting of alcohols, aldehydes and acids, were also identified as major non-esterified components. Furanoid compounds of 18 carbon atoms formed by a different route were also identified in this study. Overall, the composition of the small fraction originated from hydroperoxide scission provides a clear idea of the complexity of the new compounds formed during thermoxidation and frying.
► Analysis of oxidation products of 18:1 and 18:2 under frying conditions was performed.
► Structural characterization of these compounds by GC–MS and GC–FTIR is proposed.
► Identification of 21 short-chain esterified and 20 volatiles compounds is described.
► This work improves knowledge of hydroperoxide breakdown-generated compounds structure.
Journal: Chemistry and Physics of Lipids - Volume 165, Issue 3, April 2012, Pages 338–347