添加金属Fe3+对阿勒泰羊尾脂氧化初期脂肪酸的变化影响
Influence of Fe~(3+) in lipid oxidation and fatty acids in Altay sheep fat during initial autoxidation stage
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摘要: 以阿勒泰羊尾脂为研究对象,研究了在(4±1)℃下对其添加不同浓度的金属Fe3+储藏27d对脂肪氧化及脂肪酸的影响,结果表明:经过0.05 mol/L Fe3+处理后羊脂的p H维持在6.4左右(p<0.05)、TBARS值未达到0.5mg MDA/kg,氧化速率明显得到减缓(p<0.05)。0.05 mol/L Fe3+处理组的饱和脂肪酸含量增加了43.46%;单不饱和脂肪酸含量减少了10.87%;多不饱和脂肪酸含量下降了0.78%,0.05 mol/L Fe3+可作为降低和抑制脂肪的酸败以及其氧化速率的参考浓度。Abstract: Influence of Fe~(3+) with different content in lipid oxidation and fatty acids in Altay sheep fat during initial autoxidation stage were investigated. The result showed that after 0.05 mol/L Fe~(3+) treatment of fat,the pH was around 6.4( p<0.05),TBARS value did not reach the 0.5 mg MDA/kg( p<0.05),the rate of oxidation was decreased slowly. After treatment 0.05 mol/L Fe~(3+) group,saturated fatty acid content was increased by 43.46%,the content of monounsaturated fatty acids was decreased by 10.87%,the content of polyunsaturated fatty acid was decreased by 0.78%,0.05 mol/L Fe~(3+) can be used as a reference concentration to reduce and inhibit fat rancidity and oxidation rate.