title: Multiresidue analysis of 95 pesticides at low nanogram/liter levels in surface waters using online preconcentration and high performance liquid chromatography/tandem mass spectrometry.
abstract: A new multiresidue method for the analysis of 95 pesticides and breakdown products with a wide range of physiochemical properties in surface and ground water using online solid-phase extraction coupled with HPLC/MS/MS is presented. Using an injection volume of only 500 microL filtered water, an LOD in the 1-10 ng/L range was achieved for all but one substance, and recoveries were, with a few exceptions, in the 70-120% range. Large differences were found in the adsorption of pesticides on nine filter materials tested for filtration of the water samples. Filters of regenerated cellulose were chosen due to good recoveries and easy handling. Results from the proposed method were compared with results from previously used methods for 31 pesticides in 99 surface water samples, collected in 2008, with good agreement.
authors.affiliation: Swedish University of Agricultural Sciences (SLU), Department of Aquatic Sciences and Assessment, PO Box 7050, SE-750 07 Uppsala, Sweden. Christer.Jansson@vatten.slu.se
authors.forename: Christer
authors.initials: C
authors.lastname: Jansson
authors.forename: Jenny
authors.initials: J
authors.lastname: Kreuger
mesh_terms: D002138:Calibration; D002482:Cellulose; D002851:Chromatography, High Pressure Liquid; D005374:Filtration; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D010573:Pesticide Residues / Q000032:analysis*; D010575:Pesticides / Q000032:analysis*; D011786:Quality Control; D012015:Reference Standards; D052616:Solid Phase Extraction; D053719:Tandem Mass Spectrometry; D014867:Water / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007202:Indicators and Reagents; D010573:Pesticide Residues; D010575:Pesticides; D014874:Water Pollutants, Chemical; D014867:Water; D002482:Cellulose