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Multi-walled carbon nanotubes as solid-phase extraction sorbents for simultaneous determination of type A trichothecenes in maize, wheat and rice by ultra-high performance liquid chromatography-tandem mass spectrometry

文献类型： 外文期刊

作者： Dong, Maofeng 1 ; Si, Wenshuai 1 ; Jiang, Keqiu 3 ; Nie, Dongxia 1 ; Wu, Yongjiang; Zhao, Zhihui 1 ; De Saeger, Sar 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Minist Agr, Lab Qual & Safety Risk Assessment Agroprod Shangh, Inst Agrofood Stand & Testing Technol, Shanghai 201403, Peoples R China

2.Univ Ghent, Fac Pharmaceut Sci, Dept Bioanal, Lab Food Anal, B-9000 Ghent, Belgium

3.Zhejiang Univ, Coll Pharmaceut Sci, Hangzhou 310058, Zhejiang

关键词： Type A trichothecenes;Multi-walled carbon nanotubes;Solid-phase extraction;Ultra-high performance liquid chromatography-tandem mass spectrometry

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

ISSN：

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收录情况： SCI

摘要： A solid-phase extraction (SPE) procedure using multi-walled carbon nanotubes (MWCNTs) as sorbents coupled with ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) was developed for simultaneous determination of four type A trichothecenes in maize, wheat and rice for the first time. Several key parameters including the composition of sample loading solutions, washing and elution solvents were thoroughly investigated to achieve optimal SPE recoveries and efficiency. Performance of the MWCNTs materials was significantly affected by pH, and after optimization, n-hexane and 5% methanol aqueous solution as the washing solutions and methanol containing 1% formic acid as the elution solvent presented an excellent purification efficiency for the four targets in the different matrices. The method was validated by determining the linearity (R-2 >= 0.992), recovery (73.4-113.7%), precision (1.2-17.1%) and sensitivity (limit of quantification in the range of 0.02-0.10 mu g/kg), and was further applied for simultaneous determination of type A trichothecenes in 30 samples. Although low contamination levels of type A trichothecenes in wheat, maize and rice were observed revealing mitigated risks to consumers in Shanghai, China, the developed method has proven to be a valuable tool for type A trichothecenes monitoring in complex crop matrices. (C) 2015 Elsevier B.V. All rights reserved.

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