Fatty Acid Compositions and Physicochemical Properties of Chinese Soft-shelled Turtle Oil (Trionyx sinensis japonicus)
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Abstract
Introduction: Recently, Chinese soft-shelled turtle oil (Trionyx sinensis japonicus) is a highly popular product for food and traditional medicine. However, there is still limited information about the compositions of Chinese soft-shelled turtle oil. Thus, the aim of this study is to analyze the fatty acid compositions and physicochemical properties of Chinese soft-shelled turtle oil. Methods: The fatty acid compositions and cholesterol of Chinese soft-shelled turtle oil extracted by microwave in two lots were characterized and determined by gas chromatography. The physicochemical properties e.g. saponification value, unsaponifiable matter and moisture were analyzed according to AOAC Official method. The specific gravity, color, melting point, reflective index and infrared spectrum were also determined. Results: The physicochemical properties and fatty acid compositions were determined. Total saturated fatty acid were 31.11 and 28.95 g/100 g oil in lot 1 and 2, respectively with palmitic acid as the major component. Total monounsaturated fatty acid (MUFA) in lot 1 and 2 were 50.54 and 52.61 g/100 g oil, respectively with oleic acid as the major component. Total polyunsaturated fatty acid (PUFA) were 18.08 and 12.66 g/100 g oil in lot 1 and 2, respectively. In addition, Eicosapentaenoic acid (EPA) and Docosahexaenoic acid (DHA) were also found. Conclusion: The determination of fatty acid compositions and physicochemical properties of soft-shelled turtle oil revealed that the oil was compose of saturated fatty acid, MUFA, PUFA and also cholesterol.
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References
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