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In situ-produced CO2-assisted dispersive liquid–liquid microextraction for extraction and preconcentration of cobalt, nickel, and copper ions from aqueous samples followed by graphite furnace atomic absorption spectrometry determination

Solvent ExtractionExtractive MetallurgyChemical EngineeringEngineeringAqueous SamplesEnvironmental Analytical ChemistryMass SpectrometryAnalytical ChemistryCopper IonsChemistryMedicineElemental CharacterizationChromatography