Extraction and characterization of liver oil from silky shark
2016
Anhar Rozi | Sugeng Heri Suseno | Agoes Mardiono Jacoeb
Silky shark liver was 10-15% of its body mass and 50% of oil is contained in the liver. The aimed of<br />this study was to determine heavy metal content, fatty acid profile on raw material, extraction of its oil, and<br />parameter of oxidation. The method of heavy metal test stated on the SNI and fatty acid analysis referred<br />to AOAC. The extraction was oven methode at 50, 60, 70, and 80°C in 8 hours. Cadmium (Cd) as the<br />highest heavy metal content with 0.88±0.01 ppm, SFA was 18.46% composed by palmitic acid dominantly<br />(12.59%). The MUFA was 24.54 % with the highest oleic acid (17.86%). PUFA was 19.11 % that consist of<br />DHA (14.35%) as the most abundantly present while EPA was 1.50%. Shark liver oil which was extracted<br />at 50°C had the highest yield (24.47%). The oxidation of silky shark liver oil extraction indicated the best<br />treatment at 50°C with peroxide value (PV), p-Anisidine value (p-AV), percentage of free fatty acid (% FFA),<br />acid value (AV), and total oxidation (TOTOX) were 7.26±1.27 mEq/kg, 16.79±0.28 mEq/kg, 5.47±0.12%,<br />10.88±0.25 mg KOH/kg, and 31.31±2.26 mEq/kg respectively.<br /><br />
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