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Determination of a variety of chemical classes of pesticides in surface and ground waters by off-line solid-phase extraction, gas chromatography with electron-capture and nitrogen–phosphorus detection, and high-performance liquid chromatography with post-column derivatization and fluorescence detection

Off-line Solid-phase ExtractionEnvironmental ChemistryChemical ClassesEngineeringPesticide-residue AnalysisGas ChromatographyEnvironmental EngineeringEnvironmental Analytical ChemistryAnalytical ChemistryWater QualityLiquid ChromatographyChemical ContaminantChromatographyWater Analysis