Journal
FOOD CHEMISTRY
Volume 98, Issue 4, Pages 693-698Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2005.06.041
Keywords
fish oil; oil quality; oxidation
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The effects of storage temperature on oil quality of various fishes were examined. Fish oils extracted from horse mackerel, shad, garfish and golden mullet were used in oil analyses. Crude fish oils obtained by a solvent extraction method were stored at +4 degrees C and -18 degrees C. Chemical quality of the oils was evaluated with various parameters, including iodine, ester, acid, saponification, peroxide, and thio-barbituric acid values and unsaponifiable matter at various time intervals for 150 days of storage. All quality parameters, except iodine and ester values, increased during storage at both of temperatures. Sample oils stored at +4 degrees C preserved acceptable characteristics for 90 days. Acceptability tolerance was found to be 120 days for shad oil and 150 days for golden mullet, garfish and horse mackerel oils stored at -18 degrees C. The highest oxidative deterioration was observed in shad oils. Among all samples, garfish oil showed the greatest stability against oxidation. (c) 2005 Elsevier Ltd. All rights reserved.
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