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. 2013 May 22;11(5):1728–1762. doi: 10.3390/md11051728

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© 2013 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Patterns of GC-MS analysis of UP sample (A); standard PUFA No. 3 from menhaden oil (B); and methyl tricosanoate used as internal standard (C). The following fatty acid were identified after methyl esterification by comparing retention time with those of authentic standard (PUFA No. 3): (a) palmitic acid (C16:0), (b) cis-8,11,14,17-eicosatetraenoic acid C20:4 (ω-3), (c) Stearic acid (C18:0), (d) cis-5,8,11,14-eicosatetraenoic acid C20:4 (ω-6), (e) cis-5,8,11,14,17-eicosapentaenoic acid C20:5 (ω-3), (f) cis-4,7,10,13,16,19-docosahexaenoic acid C22:6 (ω-3).