Nature of the field-to-field distribution of pesticide residues

Árpád Ambrus, Zsuzsanna Horváth, Zsuzsa Farkas, István J. Szabó, Eniko Dorogházi, Mária Szeitzné-Szabó

Research output: Contribution to journalArticle

9 Citations (Scopus)


The supervised trial datasets (1950), consisting of a minimum of five residue values and selected by the experts of FAO/WHO Joint Meeting on Pesticide Residues for recommending maximum residue levels between 1997 and 2011, were evaluated to obtain information on the typical spread of residue values in individual datasets. The typical relative standard deviation, CV, of field-to-field variation of pesticide residues was about 80%. The spread of residues in datasets is independent from the chemical structure of pesticides, residue level, pre-harvest interval and number of values in the datasets. The CV ranges within the Codex commodity groups and between groups overlapped and their difference were not statistically significant. The number of residues below the limit of quantification (LOQ) affects the CV at various extents depending on the ratio of LOQ/R mean. The combined uncertainty of the highest residue in a dataset significantly affects the CV of the dataset. The lowest and intermediate ones have less influence. The residues in different fields receiving the same treatment vary within large range: 55%, 72%, 78%, 86% and 89% of the 25,766 residues values were, respectively, within 3, 4, 5, 6 and 7 times the median value of the corresponding dataset.

Original languageEnglish
Pages (from-to)229-244
Number of pages16
JournalJournal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes
Issue number4
Publication statusPublished - Apr 1 2014


  • Pesticide residues
  • effect of LOQ
  • field-to-field distribution
  • limit of quantification
  • relative standard deviation of residues

ASJC Scopus subject areas

  • Food Science
  • Pollution

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