色谱

色谱 ›› 2015, Vol. 33 ›› Issue (12): 1251-1256.DOI: 10.3724/SP.J.1123.2015.08008

• 研究论文 • 上一篇    下一篇

液相色谱-四极杆飞行时间质谱法快速筛查与确证中华鳖中未知着色剂

李诗言1, 王扬1, 周凡1, 郑重莺1, 张海琪1, 何中央1, 何欣2   

  1. 1. 浙江省水产质量检测中心, 浙江 杭州 310023;
    2. 浙江工商大学食品与生物工程学院, 浙江 杭州 310035
  • 收稿日期:2015-08-09 出版日期:2015-12-08 发布日期:2012-06-21
  • 通讯作者: 何中央
  • 基金资助:

    浙江省科技厅公益技术研究农业项目(2013C32062,2015C32029);浙江省自然科学基金项目(LQ14C190001);2013年浙江省农业标准化研究项目.

Rapid screening and confirmation of non-target pigment in Chinese softshell turtle by liquid chromatography coupled to time of flight mass spectrometry

LI Shiyan1, WANG Yang1, ZHOU Fan1, ZHENG Chongying1, ZHANG Haiqi1, HE Zhongyang1, HE Xin2   

  1. 1. Aquatic Products Quality Inspection Center of Zhejiang Province, Hangzhou 310023, China;
    2. School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310035, China
  • Received:2015-08-09 Online:2015-12-08 Published:2012-06-21

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200

被引次数

3

摘要：

建立了液相色谱-四极杆飞行时间质谱(LC-Q-TOF MS)对中华鳖中未知着色剂的快速筛查方法。20个中华鳖样品经过简易的乙腈提取净化后,利用液相色谱-二极管阵列检测器(LC-DAD)对未知着色剂进行定位。选定其中响应最强的样品S7,同时在线获取其在不同洗脱程序下未知着色剂定位时间段的质谱信息,经阴性样品扣除本底后匹配获得一对精确质量数差异在5 mDa以内的特征提取离子(分别为564.39773 Da和564.39561 Da)。通过质谱定性分析处理软件对上述特征提取离子对进行分子式生成,确认两者分子式为C40H52O2,推测其同为未知着色剂。结合该未知着色剂的紫外-可见光谱信息与文献资料,推断该化合物可能为角黄素。通过角黄素标准品建立的飞行时间质谱"二级确证谱库"对样品中未知着色剂进行进一步的匹配确证,最终确证其为角黄素。本研究讨论了基于LC-Q-TOF MS方法的化合物筛查策略,实验表明其可快速对中华鳖中的未知着色剂进行筛查和确证。

关键词: 未知物鉴定, 液相色谱-四极杆-飞行时间质谱法, 中华鳖, 着色剂

Abstract:

A method of non-target pigment screening in Chinese softshell turtle has been established by using liquid chromatography coupled to time of flight mass spectrometry (LC-Q-TOF MS). After being purified by a simple acetonitrile extraction work, the non-target pigment in 20 Chinese softshell turtle samples was detected by liquid chromatography-photodiode array detection (LC-DAD). The S7 sample, which has a strong spectral response, was chosen to extract the mass spectrometry information of the non-target pigment on different gradient elution conditions. In order to get the characteristic molecular mass ion (564.39773 Da and 564.39561 Da) of the non-target pigment, qualitative spectral full scan with negative sample was used. The molecular formula generation data and the literature information prompted speculation that the non-target pigment was canthaxanthin with the formula of C40H52O2. By comparing the canthaxanthin standard material MS/MS information, the result was confirmed accurate. A strategy of LC-Q-TOF MS method for the qualitative analysis of unknown compounds is discussed, and the results indicated that the described method can be effectively applied to qualitative analysis for non-target pigment in Chinese softshell turtle.

Key words: Chinese softshell turtle, liquid chromatography-quadrupole time of fight mass spectrometry (LC-Q-TOF MS), non-target compound identification, pigment

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