Comparison of Fatty Acid Component between Donkey Bones, Donkey Skin and E-jiao
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Abstract:
In order to investigate the difference of fatty acid composition between E-jiao and donkey bone glue, the fingerprints of total fatty acids in donkey bones, donkey skin, and E-jiao were established by gas chromatographic method. The content of linoleic acid, γ-linolenic acid in donkey skin and E-jiao were also studied. The results showed that fingerprints of total fatty acid in donkey skin and E-jiao were similar, except E-jiao containing arachidic acid (29.00). Compared with the donkey skin and E-jiao, the fingerprint of donkey bones showed some differences. The donkey bones contained a variety of specific fatty acids: caprylic acid (11.04), pentadecane acid (22.50), and cis-11, 14-eicosatrienoic acid (30.95), lacking linoleic acid (28.19) and γ-linolenic (29.50). As specific fatty acids, linoleic acid and γ-linolenic acid had higher content in donkey skin (12.90%, 1.10%) and E-jiao (45.25%, 5.48%). In conclusion, the fingerprints of total fatty acids in donkey bones, donkey skin, E-jiao, and the comparision analysis of the contents of linoleic acid, γ-linolenic acid in E-jiao would provide reference for quality control of E-jiao.
