Abstract:

In order to analyze and compare the fatty acids and phospholipids of Nanjing local chicken and Xinjiang Baicheng
fatty chicken, lipids were extracted from the chicken skin by solvent extraction. The fatty acid composition of the extracted
lipids was determined by gas chromatography-mass spectrometry (GC-MS) after methyl esterification. Results showed that
the contents of total lipid and total phospholipid in the skin of Nanjing local chicken were 35.56% and 7.71%, respectively,
and 42.65% and 8.95% in the skin of Xinjiang Baicheng fatty chicken, respectively, suggesting that total lipid and total
phospholipid were significantly more abundant in Baicheng fatty chicken. Totally 25 fatty acids were identified in the skin of
Nanjing local chicken and Baicheng fatty chicken by chromatographic method, respectively, mainly including 9-octadecenoic
aid, 9,12-octadecadienoic acid, hexadecanoic acid, octadecanoic acid and 9-hexadecenoic acid. Ten fatty acids were
common to both breeds which were dominated by hexadecanoic acid, oleic acid, octadecanoic acid and 9,12-octadecadienoic
acid. Hence, the same fatty acid composition with different contents was found in the two breeds. Moreover, although the
proportions of saturated fatty acids were substantially similar, the contents of unsaturated fatty acids and 9,12-octadecadienoic
acid in the skin of Nanjing local chicken were higher than those of Baicheng fatty chicken.

Key words: fatty acids, phospholipid, gas chromatography-mass spectrometry (GC-MS), Baicheng fatty chicken, Nanjing local chicken