核农学报2024，Vol.38Issue(11)：2183-2190,8.DOI:10.11869/j.issn.1000-8551.2024.11.2183
液态羊尾油的分离提取及质量评定
Isolation and Quality Evaluation of Liquid Lamb Tail Oil
摘要
Abstract
Lamb tail oil is in a liquid state at room temperature and is rich in unsaturated fatty acids,which renders it a high-quality raw material for the production of cosmetics,margarine,and shortening.To prepare high-quality liquid lamb tail oil and to enhance the added value of sheep,the tail fat of small-tailed frigid lamb as the raw material to compares the melting points and yields of the dry and solvent methods of separating and extracting the liquid tail oil.The fatty acids,melting curves,and crystalline structure of the liquid oil were characterised using gas chromatography-mass spectrometry(GC-MS),X-ray diffraction spectrometry(XRD),differential scanning calorimetry(DSC),and thermogravimetric analysis(TGA),respectively.The results demonstrated that the melting points of the liquid oils under the dry and solvent methods were 22.73 and 23.85℃,respectively,which were significantly disparate from the melting point of the refined tail oil(38.33℃).The most abundant fatty acids in the two liquid oils were oleic acid,with 52.81%and 66.35%,respectively,which is closely related to the difference in melting points of the two liquid oils.X-Diffraction results showed that no distinctive absorption peaks were observed in the liquid oils obtained by the two methods at room temperature.However,the solid fat exhibited characteristic absorption peaks at 3.7 Å,3.8 Å,3.9 Å,and 4.2 Å,indicating the presence of β'and β crystalline types in the solid oil.The thermal stability results indicate that the liquid oils obtained by the two methods are stable up to 300℃.But the triglyceride mixtures displayed a violent combustion reaction when the temperature exceeded 300℃,with the maximum rate of thermal weight loss occurring at 420℃.Furthermore,the liquid oil prepared by solvent fractionation exhibited a higher content and yield of unsaturated fatty acids.The results of this experiment provide a theoretical basis for the development of high-value products derived from lamb tail fat.关键词
羊尾脂/改性/液态尾油/油酸Key words
sheep's tail fat/fractionation/liquid tail oil/oleic acid引用本文复制引用
许建鑫,杨扬,刘慧婷,王崭铎,王钰婕,张炎..液态羊尾油的分离提取及质量评定[J].核农学报,2024,38(11):2183-2190,8.基金项目
甘肃农业大学科技创新基金-青年导师扶持基金资助项目(0522205) （0522205）
