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Ultrasonic assisted switchable solvent based on liquid phase microextraction combined with micro sample injection flame atomic absorption spectrometry for determination of some heavy metals in water, urine and tea infusion samples

Solvent ExtractionChemical EngineeringTea Infusion SamplesEngineeringLiquid Phase MicroextractionHeavy MetalsAnalytical ChemistryChemistryUltrasoundElemental Characterization