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J Chromatogr A. 2006 Sep 15;1127(1-2):254-61. Epub 2006 Jul 20.

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

Author information

1
National Public Health Laboratory, Ministry of Health, Malaysia Lot 1853, Kpg. Melayu Sungai Buloh, 47000 Sungai Buloh, Selangor, Malaysia.

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.

PMID:
16857206
DOI:
10.1016/j.chroma.2006.06.007
[Indexed for MEDLINE]

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