食品科学 ›› 0, Vol. ›› Issue (): 0-0.

• 安全检测 •    下一篇

基于m-Tyrosine和o-Tyrosine检测辐照海产品的方法学研究

邵宏宏1,相兴伟2,郑斌2,周秀锦1,杨会成2,周向阳1,傅谧妮1,晁铎源1   

  1. 1. 舟山出入境检验检疫局
    2. 浙江省海洋开发研究院
  • 收稿日期:2017-06-06 修回日期:2018-05-25 出版日期:2018-09-25 发布日期:2018-09-18
  • 通讯作者: 相兴伟 E-mail:xiangwei@zju.edu.cn
  • 基金资助:
    浙江省公益技术应用研究项目;浙江省自然科学基金项目;浙江省科技计划项目

Methodological study on the detection of irradiated seafood based on m-Tyrosine and o-Tyrosine

  • Received:2017-06-06 Revised:2018-05-25 Online:2018-09-25 Published:2018-09-18
  • Contact: Xing-Wei XIANG E-mail:xiangwei@zju.edu.cn

摘要: 利用超高效液相色谱-三重四级杆/线性离子阱质谱(ultra performance liquid chromatography-quadrupole linear ion trap mass spectrometry ,QTRAP-UPLC-MS/MS)技术测定海产品中辐照相关的多种氨基酸及同分异构体,研究辐照剂量(0.5-20 kGy)与不同海产品中辐照标识性产物间酪氨酸(m-Tyrosine)和邻酪氨酸(o-Tyrosine)的产生和含量的关系,以及不同贮藏条件和加工方式对m-Tyrosine和o-Tyrosine特异性和稳定性的影响。结果表明,辐照可诱导苯丙氨酸产生对酪氨酸(p-Tyrosine)、m-Tyrosine和o-Tyrosine,无需其它酶和微生物的作用,且含量与辐照剂量呈线性关系;此外,辐照剂量和所含水分与辐照标识物的产生含量密切相关;在-20℃下,m-Tyrosine和o-Tyrosine具有良好的稳定性;不同贮藏条件和加工方式对辐照海产品中m-Tyrosine和o-Tyrosine含量具有一定影响,但是仍能提取到足够量的m-Tyrosine和o-Tyrosine用于辐照海产品的鉴定;QTRAP-UPLC-MS/MS对海产品中o-Tyrosine和m-Tyrosine作为辐照标识物进行测定,最低可检测到经0.5 kGy辐照的样品,可准确对辐照海产品是否经过辐照进行判定,为辐照海产品的检测及食品安全监控提供依据。

关键词: 超高效液相色谱-三重四级杆/线性离子阱质谱, 辐照海产品, 苯丙氨酸, 间酪氨酸, 邻酪氨酸

Abstract: Based on the determination of tyrosine isomers and phenylalanine by QTRAP-UPLC-MS/MS, the effect of irradiation dose (0.5-20 kGy) on generation and contents of m-Tyrosine and o-Tyrosine as markers in different irradiated marine products was studied. The effects of different storage conditions and processing methods on the specificity and stability of m-Tyrosine and o-Tyrosine was investigated further. Analyses showed that phenylalanine could be converted to m-tyrosine and o-Tyrosine induced by irradiation without microorganism and enzyme, which was linearly related to irradiation doses. Furthermore, the radiation dose and moisture content were closely related to the production and contents of m-Tyrosine and o-Tyrosine which had good stability at -20℃. Different storage conditions and processing methods had certain effects on the contents of m-Tyrosine and o-Tyrosine in irradiated seafood, however, sufficient amounts could still be extracted for identification of the irradiated seafood. This credible QTRAP-UPLC-MS/MS method with m-Tyrosine and o-Tyrosine as markers could precisely identify irradiated seafood even with a dose as low as 0.5 kGy, and provided the basis for food safety monitoring.

Key words: ultra performance liquid chromatography-quadrupole linear ion trap mass spectrometry (QTRAP-UPLC-MS/MS), irradiated seafood , phenylalanine, m-Tyrosine , o-Tyrosine

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