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Ultra-trace level determination of hydroquinone in waste photographic solutions by UV–vis spectrophotometry

Ultra-trace Level DeterminationChemical EngineeringEnvironmental ChemistryEngineeringPhotochemistryEnvironmental EngineeringEnvironmental Analytical ChemistryAnalytical ChemistryUv–vis SpectrophotometryWaste Photographic SolutionsUv-vis SpectroscopyDrug Analysis