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Spectrophotometric DeterminationThin-Layer ChromatographyRelative Standard DeviationSpectrophotometric MethodGas ChromatographyChromatographic DeterminationMolar AbsorptivitySimultaneous DeterminationAbsorption SpectrometryAtomic Absorption SpectrometryHigh Performance Liquid ChromatographySolid-phase ExtractionSolid Phase ExtractionFlame Atomic Absorption SpectrometryAzide ReactionPharmaceutical PreparationsHanging Mercury Drop ElectrodeMobile PhaseDetermination of CopperPotentiometric Titration