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High-performance liquid chromatography-negative chemical ionization mass spectrometry of organophosphorus pesticides

Environmental ChemistryEngineeringPesticide-residue AnalysisGas ChromatographyEnvironmental EngineeringEnvironmental Analytical ChemistryMass SpectrometryOrganophosphorus PesticidesAnalytical ChemistryLiquid ChromatographyChemistryMedicineChromatography