Proficiency test on incurred and spiked pesticide residues in cereals

Publication: Research - peer-reviewJournal article – Annual report year: 2009

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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.
Original languageEnglish
JournalAccreditation and Quality Assurance
Publication date2009
Volume14
Issue8-9
Pages477-485
ISSN0949-1775
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 7

Keywords

  • Cereals, Pesticide residues, Preparation of test material, Incurred pesticides, Proficiency test
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