Rapid gas chromatographic method for the multiresidue screening of fruits and vegetables for organochlorine and organophosphate pesticides

J AOAC Int. 1993 Nov-Dec;76(6):1369-73.

Abstract

A rapid and reliable method was developed for the determination of pesticides in fruits and vegetables. A 100 g sample is extracted with a mixture of 200 mL petroleum ether and 100 mL 2-propanol. The extract is backwashed 4 times, twice with aqueous sodium sulfate and twice with 350 mL distilled water, and then dried over 15 g sodium sulfate. The dried extract is analyzed by capillary gas chromatography with selective organochlorine and organophosphorus detection. The method determines primarily nonpolar pesticides, with recoveries ranging from 81 to 114%, and has an average limit of detection of 10 ppb for both detectors.

MeSH terms

  • Chromatography, Gas / methods*
  • Food Contamination / analysis*
  • Fruit / chemistry*
  • Hydrocarbons, Chlorinated*
  • Insecticides / analysis*
  • Organophosphorus Compounds*
  • Pesticide Residues / analysis*
  • Time Factors
  • Vegetables / chemistry*

Substances

  • Hydrocarbons, Chlorinated
  • Insecticides
  • Organophosphorus Compounds
  • Pesticide Residues