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Quantitative analysis of Fusarium mycotoxins in maize using accelerated solvent extraction before liquid chromatography/atmospheric pressure chemical ionization tandem mass spectrometry

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A method for the simultaneous quantitative determination of deoxynivalenol (DON), fumonisin B1 (FB1) and zearalenone (ZEN) in maize by liquid chromatography-atmospheric pressure chemical ionization tandem mass spectrometry (LC-APCIMS/MS), using stable isotopically labelled and structural analogues internal standards, is described. The procedure involves accelerated solvent extraction followed by two solid-phase clean-up steps on strong anion exchange resin and a Mycosep® column. Typical recoveries were calculated by spiking blank maize at three different concentrations for deoxynivalenol (200, 400 and 1000 g kg−1) at 70%, for fumonisin B1 (100, 200 and 1000 g kg−1) at 90%, and for zearalenone (50, 100 and 200 g kg−1) at 40%. LC-APCIMS/MS analyses were realized in collision-induced dissociation on an ion-trap instrument to provide a high degree of selectivity and sensitivity. Extraction of ions from two transition reactions, monitored by LC-APCIMS/MS for each analyte, enabled a limit of detection for DON, FB1 and ZEN at, respectively, 10, 20 and 3 g kg−1, and a limit of quantification at, respectively, 50, 50 and 10 g kg−1. The robustness of the method was also evaluated with the analysis of wheat samples.
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Keywords: Fusarium; accelerated solvent extraction (ASE); atmospheric pressure chemical ionization tandem mass spectrometry (APCI-MS/MS); deoxynivalenol; fumonisin B1; maize; mycotoxins; solid-phase extraction; zearalenone

Document Type: Research Article

Affiliations: 1: Nestlé Research Center Nestec Ltd Vers-Chez-Les-Blanc CH-1000 Lausanne 26 Switzerland 2: Institute for Food Chemistry University of Münster Correnstrasse 45 D-48149 Münster Germany

Publication date: July 1, 2004

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