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Solid phase extraction of lead (II), copper (II), cadmium (II) and nickel (II) using gallic acid-modified silica gel prior to determination by flame atomic absorption spectrometry

Materials ScienceInorganic ChemistryChemical EngineeringSolvent ExtractionEngineeringTrace MetalAnalytical ChemistryChemistryMineral ProcessingElemental CharacterizationTrace ElementChromatographySolid Phase Extraction