南极磷虾油中磷脂型脂肪酸的测定方法优化及应用
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TS 254.5; S 985

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国家重点研发计划(2018YFC1406805)


Optimization and application of the method for determination of the fatty acid content in phospholipid from krill oil
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    摘要:

    南极磷虾营养价值高,因富含必需氨基酸、磷脂、虾青素和多不饱和脂肪酸(PUFAs)而具有良好的开发价值。目前,对南极磷虾及其制品脂肪酸含量的分析主要集中在总脂肪酸含量的测定,由于PUFAs不同酯的结合会影响其生物利用度,因此,有必要对南极磷虾不同类型酯的脂肪酸含量进行准确定量。为了明确南极磷虾油中磷脂(PL)型脂肪酸含量,基于固相萃取建立南极磷虾油中PL型脂肪酸含量的气相色谱分析方法。通过优化各实验条件,在最优条件下通过本方法测得的加标回收率在84.22%~94.45%,日内和日间精密度在0.79%~6.09%之间。将本方法应用在测量南极磷虾油在贮藏过程中PL型脂肪酸的含量变化中,结果表明,在21 d贮藏过程后,PL型脂肪酸含量均下降,且降解率随温度升高而增加。本研究为南极磷虾脂质研究提供了方法学支持。

    Abstract:

    Due to richness in essential amino acids, phospholipids, astaxanthin and omega-3 polyunsaturated fatty acids (PUFAs), Antarctic krill (Euphausia superba) which was abundant and had high nutritional value was considered to have great development value. At present, the analysis of fatty acid contents in Antarctic krill and its products mainly focused on the determination of total fatty acid contents. Owing to the effect of bioavailability for PUFAs in different esters, it was necessary to accurately quantify the content of fatty acid in different types of esters in Antarctic krill and its products. In order to clarify the content of phospholipids (PL) fatty acids in Antarctic krill oil, a gas chromatography analysis method for the content of fatty acids in PL in Antarctic krill oil was established based on solid phase extraction. After optimizing the various conditions of the impact analysis, under the optimal conditions, the recoveries of the standard addition measured by this method were between 84.22%-94.45%, and the intra-day and inter-day precision were between 0.79%-6.09%. This method was applied to measure the changes in the content of various PL fatty acids of Antarctic krill oil during storage. The results showed that the content of PL fatty acids decreased during the 21-day storage process, and the degradation rate increased with increasing temperature. The present study provided methodological support for the study of lipids in Antarctic krill.

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王诗淼,杨春雨,赵琪,李健.南极磷虾油中磷脂型脂肪酸的测定方法优化及应用[J].水产学报,2022,46(3):439~444

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  • 收稿日期:2021-11-30
  • 最后修改日期:2022-02-12
  • 录用日期:2022-02-23
  • 在线发布日期: 2022-03-21
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