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Proficiency test on incurred and spiked pesticide residues in cereals

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Abstract

A proficiency test on incurred and spiked pesticide residues in wheat was organised in 2008. The test material was grown in 2007 and treated in the field with 14 pesticides formulations containing the active substances, alpha-cypermethrin, bifentrin, carbendazim, chlormequat, chlorpyrifos-methyl, difenconazole, epoxiconazole, glyphosate, iprodione, malathion, pirimicarb, prochloraz, spiroxamin and trifloxystrobin. After harvest, the test material was additionally spiked in the laboratory with three pesticides, that where the residues were too low, and axozystrobin. In total, 72 laboratories submitted results and z-scores were calculated for all laboratories and pesticides, except for glyphosate where only five laboratories submitted results and summed weighted z-scores were calculated for the laboratories with a sufficient scope. For several pesticides, the submitted results were strongly depending on the extraction procedure and consequently the assigned values were calculated based on part of the results. Acceptable z-scores were obtained by 56–97% of the participants.

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Acknowledgment

The authors wish to thank the members of the Advisory Group for their valuable advice: Amadeo R. Fernández-Alba, Antonio Valverde, André de Kok, Arne Andersson, Michelangelo Anastassiades, Miguel Gamón, Ralf Lippold, Stewart Reynolds, Sonja Masselter and Tuija Pihlström. Additionally, the authors wish to thank Klaus Paaske, for his indispensable help with the field treatment and production of the raw wheat material.

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Authors and Affiliations

  1. National Food Institute, Soeborg, Denmark

    Mette Erecius Poulsen, Hanne B. Christensen & Susan S. Herrmann

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  1. Mette Erecius Poulsen
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  2. Hanne B. Christensen
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  3. Susan S. Herrmann
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Correspondence to Mette Erecius Poulsen.

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Poulsen, M.E., Christensen, H.B. & Herrmann, S.S. Proficiency test on incurred and spiked pesticide residues in cereals. Accred Qual Assur 14, 477–485 (2009). https://doi.org/10.1007/s00769-009-0555-2

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  • DOI: https://doi.org/10.1007/s00769-009-0555-2

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