食品科学 ›› 2018, Vol. 39 ›› Issue (12): 288-294.doi: 10.7506/spkx1002-6630-201812044

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18O标记联合高效液相色谱-高分辨率质谱技术定量测定阿胶中的明胶

沙小梅1,胡姿姿1,涂宗财1,2,*,张路正1,李鑫1,王辉2,张露1,黄涛2   

  1. (1.江西师范大学生命科学学院,江西?南昌 330022;2.南昌大学 食品科学与技术国家重点实验室,江西?南昌 330047)
  • 出版日期:2018-06-25 发布日期:2018-06-15
  • 基金资助:
    国家自然科学基金地区科学基金项目(31660487);江西省教育厅科学技术研究项目(GJJ150303); 江西省重点研发计划项目(20161BBF60096);江西省现代农业产业技术体系建设专项(JXARS-03) 第一作者简介:沙小梅(1987—),女,讲师,博士,研究方向为绿色食物资源高值化利用。E-mail:shaxiaomei1987@sina

Quantification of Gelatin in Donkey-Hide Gelatin by Oxygen-18 Labelling and High Performance Liquid Chromatography Linear Ion Trap/Orbitrap High Resolution Mass Spectrometry

SHA Xiaomei1, HU Zizi1, TU Zongcai1,2,*, ZHANG Luzheng1, LI Xin1, WANG Hui2, ZHANG Lu1, HUANG Tao2   

  1. (1. College of Life Science, Jiangxi Normal University, Nanchang 330022, China; 2. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China)
  • Online:2018-06-25 Published:2018-06-15

摘要: 采用胰蛋白酶催化的18O标记联合高效液相色谱-高分辨率串联质谱技术(high performance liquid chromatography-linear ion trap/Orbitrap high-resolution mass spectrometry,HPLC-LTQ/Orbitrap MS/MS)研究阿胶的特征性多肽的18O标记情况和明胶混合物中阿胶、牛皮明胶的定量情况。结果表明,阿胶的特征性多肽均能被2?个18O原子标记,当18O和16O标记多肽以20∶1、10∶1、5∶1、1∶1和1∶5的质量比例混合时,检测到的18O与16O标记多肽比值分别为19.66、10.24、5.01、1.00和0.20。当阿胶和牛皮明胶质量比以1∶10、1∶1和10∶1混合,以18O标记物为内标,检测到的阿胶与明胶比值分别为0.10、1.02和9.72。因此,胰蛋白酶催化的18O标记联合HPLC-LTQ/Orbitrap?MS/MS适用于阿胶产品中目标明胶的含量检测,可为阿胶产品的质量控制提供技术支撑。

关键词: 阿胶, 牛皮明胶, 定量检测, 胰蛋白酶催化的18O标记, 高效液相色谱-高分辨率质谱技术

Abstract: In this work, trypsin-catalyzed 18O labeling combined with high performance liquid chromatography-linear ion trap/Orbitrap high-resolution mass spectrometry (HPLC-LTQ/Orbitrap MS/MS) was used to study the 18O labeling characteristics of marker peptides in donkey-hide gelatin. Moreover, the method was applied to quantify donkey-hide gelatin and bovine-hide gelatin in their mixtures. Under trypsin catalysis, all the marker peptides of donkey-hide gelatin were labeled by two 18O atoms. The measured ratios for 18O-labeled and 16O-labeled peptide mixtures at ratios of 20:1, 10:1, 5:1, 1:1 and 1:5 were 19.66, 10.24, 5.01, 1.00 and 0.20, respectively. The measured ratios for mixtures of donkey-hide gelatin and bovine-hide gelatin at ratios of 1:10, 1:1 and 10:1 using 18O-labeled characteristic peptides as the internal standard were 0.10, 1.02 and 9.72, respectively. The results showed that trypsin-catalyzed 18O labeling combined with HPLC-LTQ/Orbitrap MS/MS should be a promising method to quantify the target gelatin and control the quality of donkey-hide gelatin product.

Key words: donkey-hide gelatin, bovine-hide gelatin, quantification, trypsin-catalyzed 18O labeling, high-performance liquid chromatography-high-resolution mass spectrometry

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