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Liquid–Liquid Extraction for Sample Preparation prior to Gas Chromatography and Gas Chromatography–Mass Spectrometry Determination of Herbicide and Pesticide Compounds

Environmental ChemistryEngineeringPesticide-residue AnalysisSample PreparationEnvironmental EngineeringMedicineGas ChromatographyMass SpectrometryPesticide CompoundsLiquid–liquid ExtractionAnalytical ChemistryLiquid ChromatographySample Pre-treatmentPharmacologyChromatographyDrug Analysis