Determination of organochlorine and pyrethroid pesticides in fruit and vegetables using solid phase extraction clean-up cartridges

J Chromatogr A. 2006 Sep 15;1127(1-2):254-61. doi: 10.1016/j.chroma.2006.06.007. Epub 2006 Jul 20.

Abstract

A method to determine six organochlorine and three pyrethroid pesticides in grape, orange, tomato, carrot and green mustard based on solvent extraction followed by solid phase extraction (SPE) clean-up is described. The pesticides were spiked into the sample prior to analysis, extracted with ethyl acetate, evaporated and reconstituted with a solvent mixture of acetone:n-hexane (3:7). Three different sorbents (Strong Anion Exchanger/Primary Secondary Amine (SAX/PSA), Florisil and C18) were used for the clean-up step. Pesticides were eluted with 5mL of acetone:n-hexane (3:7, v/v) and determined by gas chromatography and electron-capture detection (GC-ECD). SAX/PSA was the sorbent, which provided chromatograms with less interference and the mean recoveries obtained were within 70-120% except for captafol. The captafol recoveries for grape were within acceptable range with C18 clean-up column.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chemical Fractionation / methods
  • Chromatography, Gas / instrumentation
  • Chromatography, Gas / methods*
  • Fruit / chemistry*
  • Hydrocarbons, Chlorinated / analysis*
  • Pesticides / analysis*
  • Pyrethrins / analysis*
  • Vegetables / chemistry*

Substances

  • Hydrocarbons, Chlorinated
  • Pesticides
  • Pyrethrins