A study of the disappearance of pesticides during composting using a gas chromatography-tandem mass spectrometry technique.

Autor: Garrido Frenich A; Department of Analytical Chemistry, University of Almería, 04120 Almería, Spain., González Rodríguez MJ, Martínez Vidal JL, Arrebola FJ, Hernández Torres ME
Jazyk: angličtina
Zdroj: Pest management science [Pest Manag Sci] 2005 May; Vol. 61 (5), pp. 458-66.
DOI: 10.1002/ps.984
Abstrakt: 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.
Databáze: MEDLINE