Determination of Organophosphorus Pesticides in Vegetables by Solid-Phase Extraction Cleanup and Gas Chromatography
A simple and rapid gas chromatography method has been developed for simultaneous determination of organophosphorus pesticides in vegetables. Residues are extracted with acetone and dichloromethane. Extracts are cleaned up by a mixed-mode solid-phase extraction column, quaternary amine and aminop...
| Main Authors: | , |
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| Format: | Article |
| Language: | English English |
| Published: |
Universiti Putra Malaysia Press
2003
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| Online Access: | http://psasir.upm.edu.my/id/eprint/3746/1/Determination_of_Organophosphorus_Pesticides_in_Vegetables.pdf |
| Summary: | A simple and rapid gas chromatography method has been developed for
simultaneous determination of organophosphorus pesticides in vegetables.
Residues are extracted with acetone and dichloromethane. Extracts are cleaned
up by a mixed-mode solid-phase extraction column, quaternary amine and
aminopropyl silane. The pesticides are determined by gas chromatography
using a flame photometric detector. The recoveries for 9 pesticides in three
vegetables: carrot, cucumber and green mustard, fortified at 0.5 mg/kg were in
the range of 80.3% to 115.0%. Lower recoveries were obtained for
methamidophos and dimethoate. The results were compared to the method
currently used in the laboratory which does not include any cleanup. |
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