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Simultaneous spectrophotometric determination of thorium and rare earth metals with pyrimidine azo dyes and cetylpyridinium chloride

Rare Earth MineralChemical EngineeringPyrimidine Azo DyesRare Earth MetalsEngineeringNatural SciencesSpectroscopySimultaneous Spectrophotometric DeterminationMass SpectrometryAnalytical ChemistryRare MetalChemistryElemental CharacterizationTrace Element