南极磷虾油的分级制备及其品质分析

为实现南极磷虾油品质导向的高效制备,实验以全脂南极磷虾粉为原料,以豆油或中链甘油三酯作为载体助溶剂,采用协同超临界CO2萃取技术制备甘油三酯富集型油脂(一级油);再以萃取后的南极磷虾粉饼粕为原料,采用乙醇提取法制备磷脂富集型油脂(二级油).基于所得磷虾油的脂质组成、磷脂酰胆碱和磷脂酰乙醇胺的绝对含量为考察指标,优选了3...

Fractional preparation of Antarctic krill oil and its quality analysis

Antarctic krill oil refers to the lipid extracted from Euphausia superba. Recently, it has attracted great concerns from academia and industry due to its unique composition. However, the lack of standards, complex composition and differences in processing methods can easily lead to unstable quality of Antarctic krill oil products, further limits the in-depth research on its functional properties and restricts the development of the Antarctic krill oil industry. Thus, the fractional preparation of Antarctic krill oil and its quality analysis were explored in this study. Firstly, the whole Antarctic krill meal was used as the raw material, and soybean oil or medium chain triglycerides (MCT) was used as the co-solvent carrier in conjunction with supercritical CO2 extraction technology to prepare triglyceride-enriched oil (first grade oil). And then, the extracted Antarctic krill meal was subjected to alcohol extraction to prepare a phospholipid-enriched oil (second grade oil). Considering the lipid composition, and content of phosphatidylcholine and phosphatidylethanolamine as the inspection indicators, 30% soybean oil was selected as the co-solvent carrier in conjunction with supercritical CO2 extraction technology to prepare Antarctic krill oil. The results showed that, comparing with the non-cosolvent group and the ethanol group, the co-solvent carrier (30% soybean oil) group had the highest extraction rate of primary oil, suggesting the phospholipids of the first and second grade oils were effectively separated, and its polyene index, atherosclerosis index and thrombosis index were relatively low. The phospholipid content of Antarctic krill oil prepared by fractionation in the present study was significant different, which not only enriched the types of krill oil products, but also provided theoretical guidance for the selection and formulation of subsequent Antarctic krill oil extraction technology. It is suggested that the research of Antarctic krill oil in the future should focus on the influence of typical processes on the composition, structure and functional properties of krill oil and their related mechanisms, which would be helpful to achieve precise regulation and efficient production of Antarctic krill oil with target functionalities.