BLUE SHARK RIVER OIL (PRIONACE GLAUCA) - FRACTIONATION AND STABILIZATION WITH ANTIOXIDANTS

Crude oil was obtained by boiling (75 degrees C / 15 min) mashed liver s of the blue shark (Prionace glauca). The crude oil was dry fractiona ted and the oxidative stability of both the crude oil and it's fractio ns (olein and stearin) was evaluated using the Rancimat method (80 deg rees C; 2.5 g sample; 20L/h air flow). The efficiency of the following antioxidants, Butylated Hydroxy Toluene (BHT), Tertiary Butyl Hydroqu inone (TBHQ), Ascorbil Palmitate (PA), ANTRACINE 220 (TBHQ + citric ac id). TOCOMIX D (alpha and gamma tocopherols) and RENOXAN A (Ascorbil P almitate + Lecitin + alpha tocopherol), were tested in various concent rations. The concentration of polyunsaturated fatty acids was 28% in t he whole crude oil; 24% in the stearin fraction and 33% in the olein; the oxidative stability was inversely related to the content of polyun saturated fatty acids. TBHQ was the most efficient antioxidant in crud e oil as well as in the fractions. Treatment with the natural antioxid ant RENOXAN A was also highly efficient, though less so than TBHQ.