Variability of organophosphorus insecticide residues in large size crops grown in commercial farms in Brazil

Eloisa Caldas, Andreia Jardim, A. Ámbrus, Luiz Cesar Souza

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Field trials were conducted in commercial agricultural areas in Brazil to determine the variability of residues of parathion methyl, diazinon and methidathion in individual units of large crops treated twice with a mixture of the three pesticides. Over 120 random samples were collected, extracted with ethyl acetate and residues determined by GC/FPD. The recoveries and their coefficient of variation were, in general, within the acceptable levels during sample analyses. Residues in papaya and mango were not affected by the position of the fruits in the plant, apparently more or less exposed to the pesticides. Variability factor ν, defined as the 97.5th percentile divided by the mean of residues in all samples taken from a field ranged from 2.0-2.6. The variability of residues within the plant contributed to about 34-61% of the field variability. The results found in this study support the variability factor of 3 adopted by the FAO/WHO for the deterministic estimation of dietary acute intake of pesticides.

Original languageEnglish
Pages (from-to)148-158
Number of pages11
JournalFood Additives and Contaminants
Volume23
Issue number2
DOIs
Publication statusPublished - Feb 2006

Fingerprint

insecticide residues
organophosphorus insecticides
commercial farms
Insecticides
Pesticides
Farms
Crops
Brazil
crops
Methyl Parathion
pesticides
Diazinon
Carica
Mangifera
Fruits
methidathion
Fruit
parathion-methyl
diazinon
papayas

Keywords

  • Food
  • Organophosphorus
  • Pesticides
  • Variability factor

ASJC Scopus subject areas

  • Food Science
  • Chemistry (miscellaneous)
  • Toxicology
  • Health, Toxicology and Mutagenesis

Cite this

Variability of organophosphorus insecticide residues in large size crops grown in commercial farms in Brazil. / Caldas, Eloisa; Jardim, Andreia; Ámbrus, A.; Souza, Luiz Cesar.

In: Food Additives and Contaminants, Vol. 23, No. 2, 02.2006, p. 148-158.

Research output: Contribution to journalArticle

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