4.7 Article

Multitoxin extraction and detection of trichothecenes in cereals: an improved LC-MS/MS approach

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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
卷 89, 期 7, 页码 1145-1153

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JOHN WILEY & SONS LTD
DOI: 10.1002/jsfa.3564

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Fusarium mycotoxins; trichothecenes; zearalenone; cereals; LC-MS/MS; simultaneous extraction; simultaneous determination

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BACKGROUND: Many multiresidual methods to evaluate natural occurrence of Fusarium toxins are already reported in the scientific literature but a new rapid, reliable, cost-efficient and high-sensitivity method for the simultaneous determination of several fusariotoxins is always welcome. Nivalenol (NIV), deoxynivalenol, fusarenon-X (FUS-X), 3-acetyldeoxynivalenol, diacetoxyscirpenol (DAS), HT-2 toxin, T-2 toxin, neosolaniol (NEO), zearalanone and zearalenone (ZON) belong to the most common mycotoxins in food matrix grains, e.g., wheat and maize. The proposed method is a multitoxin analytical method that combines high-performance liquid chromatography (HPLC), atmospheric pressure chemical ionization (APCI), triple-quadrupole tandem mass spectrometry (LC-MS/MS) under the selected reaction monitoring (SRM) mode, and it is focused on the optimization of the sample preparation without the need for any cleanup. RESULTS: Three different methods for sample preparation and for the simultaneous extractions of the above-mentioned fusariotoxins were tested: two of these were followed by a different cleanup step for comparison, while the extraction method proposed in this work, which uses an 84% (v/v) acetonitrile aqueous solution, sample homogenization and subsequent filtration, was validated without any further cleanup step. CONCLUSION: Calibration curves for all analytes are linear, except DAS,HT-2 and ZON, over the working range of 10-1000 mu g kg(-1). The calibration curve of DAS was linear between 10 and 500 mu g kg(-1), although the curves of HT-2 and ZON were linear in the range 10-250 mu g kg(-1). Squared correlation coefficients (R(2)) were in the range 0.995-0.998 for the all point calibration curves. The lowest limits of detection (LOD) were found for DON and ZAN with 0.5 and 0.2 mu g kg(-1), respectively, while the highest LODs were obtained for NIV, FUS-X and NEO, with 3.3 mu g kg(-1) for each toxin. (C) 2009 Society of Chemical Industry

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