食品科学 ›› 2018, Vol. 39 ›› Issue (18): 199-203.doi: 10.7506/spkx1002-6630-201818031

• 成分分析 • 上一篇    下一篇

离子阱质谱测定脂质鉴别深海鱼油

李鑫1,2,刘霞1,*,李培武2,*,王秀嫔2   

  1. (1.湖南农业大学食品科学技术学院,食品科学与生物技术湖南省重点实验室,湖南?长沙 410128;2.中国农业科学院油料作物研究所,农业部油料作物生物学与遗传改良重点实验室,农业部油料及制品质量监督检验测试中心,农业农村部油料产品质量安全风险评估实验室(武汉),农业部生物毒素检测重点实验室,湖北?武汉 430062)
  • 出版日期:2018-09-25 发布日期:2018-09-18
  • 基金资助:
    农业部引进国际先进农业科学技术计划(948计划)项目(2016-x29)

Detection of Deep Sea Fish Oil Adulteration by Lipid Analysis Using Ion Trap Mass Spectrometry

LI Xin1,2, LIU Xia1,*, LI Peiwu2,*, WANG Xiupin2   

  1. (1. Hunan Province Key Laboratory of Food Science and Biotechnology, College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China; 2. Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Quality Inspection and Test Center for Oilseeds Products, Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China)
  • Online:2018-09-25 Published:2018-09-18

摘要: 建立基于高效液相色谱-离子阱质谱脂质识别技术,用于鉴别合成乙酯型和天然甘油酯型深海鱼油。使用反相液相色谱,C18色谱柱,异丙醇和乙腈梯度洗脱分离脂质。使用离子阱质谱数据依赖型二级扫描获得脂质多级碎裂指纹信息。通过总离子流、一级质谱、二级质谱离子树识别脂质指纹信息。识别获知二十二碳六烯酸(docose hexaenoie acid,DHA)和二十碳五烯酸(eicosapentaenoic acid,EPA)在乙酯型深海鱼油中存在方式为CH3CH2O-DHA和CH3CH2O-EPA,而在天然甘油酯型深海鱼油的存在方式为甘油三酯指纹信息。此方法能准确区分乙酯型深海鱼油和甘油酯型深海鱼油。

关键词: 深海鱼油, 快速鉴别, 离子阱质谱, 脂质, 二十二碳六烯酸, 二十碳五烯酸

Abstract: In this paper, a high performance liquid chromatography coupled to ion trap mass spectrometry (HPLC-ITMS) method was used to identify synthetic ester-type and natural glyceride-type deep sea fish oils by lipid analysis. Lipids were separated by reversed phase HPLC on a C18 column using gradient elution with isopropyl alcohol and acetonitrile. Multistage fragmentation fingerprints were acquired by ion trap mass spectrometry under a data-dependent scan mode. The fingerprint information was identified from the total ion current spectra, mass spectra and tandem mass spectra. It was found that docose hexaenoie acid (DHA) and eicosapentaenoic acid (EPA) existed in ester-type fish oil as CH3CH2O-DHA and CH3CH2O-EPA, respectively, while both existed as triglycerides in glyceride-type fish oil. This method can accurately distinguish between ethyl ester-type and glyceride-type deep sea fish oils.

Key words: deep sea fish oil, rapid identification, ion trap mass spectrometry, lipid, docose hexaenoie acid, eicosapentaenoic acid

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