Occurrence of Conjugated Cyclopropanoid Acid in Purified Fish Oil

Authors: Horii, Naoto; Arato, Shingo; Narayan, Bhaskar; Hosokawa, Masashi; Sashima, Tokutake; Miyashita, Kazuo

Source: Journal of the American Oil Chemists' Society, Volume 84, Number 8, August 2007 , pp. 749-754(6)

Publisher: Springer

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Abstract:

The presence of conjugated trienoic acids were found in the purified fish oil from the Japanese sardine by an analysis of high performance liquid chromatography equipped with a photodiode-array detector. Gas chromatography-mass spectrometry indicated that main conjugated trienoic acids were those of 16:3, 20:5, and 22:6. Conjugated trienoic acid of 16:3 was identified as a cyclopropanoid acid with conjugated triene by NMR analysis. All conjugated trienoic acids were formed by heat treatment during the deodorization of fish oil, but not found after de-gumming, alkaline refining, and bleaching. Conjugated trienoic acids of 16:3, 20:5, and 22:6 originated from 16:4n-1, 20:5n-3 (EPA), and 22:6n-3 (DHA) in the fish oil during the heat treatment for deodorization.

Keywords: HPLC; Conjugated triene; Fish oil; 16:4n-1; EPA; DHA

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s11746-007-1100-2

Affiliations: 1: Email: kmiya@fish.hokudai.ac.jp

Publication date: 2007-08-01