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- Title
A study of the disappearance of pesticides during composting using a gas chromatography-tandem mass spectrometry technique.
- Authors
Frenich, A. Garrido; González Rodríguez, Manuel J.; Arrebola, Francisco J.; Hernández Torres, María E.; Martínez Vidal, José L.
- Abstract
A simple method for multi-residue analysis of pesticides by low-pressure gas chromatography-tandem mass spectrometry (LP-GC-MS-MS) has been validated in compost samples. The pesticide residues were extracted from the lyophilised samples with organic solvent by stirring. No sample clean-up was required prior to the analysis. The method was applied to determine the fate of two organochlorine pesticides (lindane and endosulfan) and two organophosphates (malathion and chlorpyrifos-methyl) during the composting process in the reactor of a pilot plant. Malathion, chlorpyrifos-methyl and lindane residues almost fully disappeared after 8 days of maturation in the reactor, while endosulfan residues were only partially degraded. Alongside this, a study of natural disappearance of the pesticides was carried out in the laboratory and a characteristic time profile was traced for each pesticide class.
- Subjects
PESTICIDE research; GAS chromatography/Mass spectrometry (GC-MS); COMPOSTING; ORGANOCHLORINE compounds; ORGANOPHOSPHORUS compounds; AGRICULTURAL wastes; AGRICULTURAL chemicals
- Publication
Pest Management Science, 2005, Vol 61, Issue 5, p458
- ISSN
1526-498X
- Publication type
Article
- DOI
10.1002/ps.984