Liquid chromatography quadrupole linear ion trap mass spectrometry for multiclass screening and identification of lipophilic marine biotoxins in bivalve mollusks

文献类型： 外文期刊

第一作者： Wu, Haiyan

作者： Wu, Haiyan;Guo, Mengmeng;Tan, Zhijun;Li, Zhaoxin;Zhai, Yuxiu;Wu, Haiyan;Guo, Mengmeng;Tan, Zhijun;Li, Zhaoxin;Zhai, Yuxiu;Wu, Haiyan;Guo, Mengmeng;Tan, Zhijun;Li, Zhaoxin;Zhai, Yuxiu;Wu, Haiyan;Guo, Mengmeng;Tan, Zhijun;Li, Zhaoxin;Zhai, Yuxiu;Cheng, Haiyan

作者机构：

关键词： Lipophilic marine biotoxins;LC-QqLIT-MS;Solid phase extraction;Product ion library

期刊名称：JOURNAL OF CHROMATOGRAPHY A （ 影响因子：4.759； 五年影响因子：4.302 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： A liquid chromatography quadrupole linear ion trap mass spectrometry method with fast polarity switching and a scheduled multiple reaction monitoring algorithm mode was developed for multiclass screening and identification of lipophilic marine biotoxins in bivalve molluscs. A major advantage of the method is that it can detect members of all six groups of lipophilic marine biotoxins [okadaic acid (OA), yessotoxins (YTX), azaspiracids (AZA), pectenotoxins (PTX), cyclic imines (CI), and brevetoxins (PbTx)], thereby allowing quantification and high confidence identification from a single liquid chromatography tandem mass spectrometry (LC-MS/MS) injection. An enhanced product ion (EPI) library was constructed after triggered collection of data via information-dependent acquisition (IDA) of EPI spectra from standard samples. A separation method for identifying 17 target toxins in a single analysis within 12 min was developed and tested. Different solid phase extraction sorbents, the matrix effect (for oyster, scallop, and mussel samples), and stability of the standards also were evaluated. Matrix-matched calibration was used for quantification of the toxins. The limits of detection were 0.12-13.6 μg/kg, and the limits of quantification were 0.39-45.4 μg/kg. The method was used to analyze 120 shellfish samples collected from farming areas along the coast of China, and 7% of the samples were found to be contaminated with toxins. The library search identified PbTx-3, YTX, OA, PTX2, AZA1, AZA2, and desmethylspirolide C (SPX1). Overall, the method exhibited excellent sensitivity and reproducibility, and it will have broad applications in the monitoring of lipophilic marine biotoxins.

分类号： O65

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