Abstract
The fatty acid composition of the liver oil from the Black Sea dogfish Squalus acanthias , as well as its seasonal variations were determined. A scheme for concentration of polyunsaturated fatty acids from the dogfish liver oil by urea complexation was proposed. From 360g of free fatty acids a 48g concentrate was obtained, containing 7,8% C 20:4 , 16,4% C 20:5 . 9,2% C 22:5 and 49,7% C 22:6 .
Highlights
The increasing interest in the nutritional and pharmacological properties of the n-3 polyunsaturated fatty acids (PUFA) has led to efforts to develop procedures for the preparation of highly concentrated fractions of some n-3 fatty acids (FA).Despite the high glyceryl ether content the dogfish liver oil seems to be a good source of PUFA (Ackman et al, 1988; Ratnayake et al, 1988)
An urea complexing of the free FA from the liver oil of S. acanthias, followed by esterification and low-pressure distillation of the FA ethyl esters produced a concentrate containing 65.5% PUFA (Ratnayake et al, 1988)
In this paper we present a suitable method for the preparation of PUFAconcentrates from dogfish liver oil
Summary
Preparation of polyunsaturated fatty acid concentrates from tiie liver oil of dogfish (Squalus acanthias) from the Black Sea. The fatty acid composition of the liver oil from the Black Sea dogfish Squalus acanthias, as well as its seasonal variations were determined. A scheme for concentration of polyunsaturated fatty acids from the dogfish liver oil by urea complexation was proposed. From 360g of free fatty acids a 48g concentrate was obtained, containing 7,8% C20:4,16,4% C20:5, 9,2% C22:5 and 49,7% C22:6-. KEY-WORDS: Black sea - Liver oil of dogfish Polyunsaturated fatty acid (concentrate)
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