Journal
FOOD CONTROL
Volume 27, Issue 1, Pages 188-193Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2012.03.014
Keywords
QuEChERS; Zearalenone (ZON); Trichothecenes (TRs); Popcorn; Gas chromatography-mass spectrometry (GC-MS)
Categories
Funding
- FCT [PTDC/AGR-ALI/101583/2008]
- COMPETE FSE/FEDER/OE
- [PEst-C/EQB/LA0006/2011]
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In this work a gas chromatography-mass spectrometry (GC-MS) method for multi-mycotoxins (deoxynivalenol, nivalenol, 15-acetyl-deoxynivalenol, fusarenon X and zearalenone) determination in unpopped and popped popcorn was optimized and validated. Fast sample preparation procedure is based on a pre-extraction of fat compounds with n-hexane, extraction of target analytes with acetonitrile and removing of matrix co-extracts by a simple dispersive solid phase extraction employing MgSO4 and C18 sorbents followed by sylilation of the analytes and further GC-MS analysis. The recoveries in spiked samples (20 and 100 mu g/kg) ranged from 61 to 118% in unpopped popcorn and from 65 to 89% in popped popcorn, with relative standard deviations lower than 18%. Limits of detection and quantification were lower than 65 mu g/kg and 196 mu g/kg, respectively. The method was applied in 30 popcorn samples commercialized in Portugal; one sample was positive for nivalenol and zearalenone, at concentrations below the maximum permissible level. (C) 2012 Elsevier Ltd. All rights reserved.
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