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Determination of nitrate in environmental water samples by conversion into nitrophenols and solid phase extraction−spectrophotometry, liquid chromatography or gas chromatography–mass spectrometry

Gas Chromatography–mass SpectrometryEnvironmental ChemistryEngineeringGas ChromatographyWater MonitoringEnvironmental EngineeringEnvironmental Analytical ChemistryAnalytical ChemistryWater QualityEcotoxicologyEnvironmental Water SamplesLiquid ChromatographyChromatographyWater Analysis