Abstract
This study aimed to evaluate the impact of various oil extraction procedures on yield, color properties, fatty acid profile and oxidative stability of common Kilka (Clupeonella cultriventris caspia) oil. The supercritical fluid extraction (SFE) with carbon dioxide, than other techniques (wet reduction, ammonia and enzymatic extractions), showed the highest oil yield (96.94%), the best oxidative and color characteristics, with 0.68mg KOH/g oil, 2.62meq O2/kg oil, 6.5 and 5.36 in terms of acid value (AV), peroxide value (PV), yellowness and redness, respectively, and have the highest total of unsaturated fatty acids average (10.33), especially the omega-3 family. Furthermore, the oil obtained by SFE had the best oxidative parameters; AV, PV and thiobarbituric acid values, during the whole 90days of storage time at 4°C. Therefore, the SFE is the most effective procedure at obtaining the oil from common Kilka tissue than other methods studied in this research.
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