Simple analytical methodology based on solid phase extraction for monitoring pesticide residues in natural waters.

Pesticide contamination of natural waters due to agricultural activities has been a widely publicized topic over the past 30 years and will continue to be a problem in the future. The determination of pesticide residues in water samples is necessary for solving various environmental problems. The aim of this work was to develop an efficient method on the basis of solid phase extraction (SPE) technique for the determination of 34 multiclass pesticides in natural waters.

Environmental monitoring and risk assessment of pesticide residues in surface waters of the Louros River (N.W. Greece).

Estuarine environments are being constantly stressed by new sources of pollution (e.g. pesticides) derived from activities of industry and intensive agriculture.

Organophosphorus pesticide residues in Greek virgin olive oil: levels, dietary intake and risk assessment.

The occurrence of organophosphorus pesticide (OPs) and their metabolite residues was investigated in 167 samples of Greek virgin olive oil during a 2-year (2004-2005) sampling campaign. A total of 30.5% of samples contained detectable residues, although only one sample contained dimethoate residues above the maximum residue limit.

Screening method for organophosphorus insecticides and their metabolites in olive oil samples based on headspace solid-phase microextraction coupled with gas chromatography.

This work is focused on the effectiveness of headspace solid-phase microextraction (HS-SPME) for the analysis of nine organophosphorus (OPs) insecticides (dimethoate, diazinon, fenitrothion, malathion, fenthion, parathion ethyl, methyl bromophos, methidathion, ethion) and four metabolites (omethoate, malaoxon, fenthion sulfoxide and fenthion sulfone) residues in olive oil samples. The efficiency of six fibre types with different film thickness was compared. PDMS (100 microm) was found to be the most suitable fibre for the analysis of OPs in olive oils.