Solidi ed oating organic drop microextraction for speciation of Se (IV) and Se(VI) in water samples prior to electrothermal atomic absorption spectrometricdetection

A simple and fast solidi ed oating organic drop microextraction (SFODME) method is suggested for thespeciation of Se (IV) and Se (VI) in water samples prior to electrothermal atomic absorption spectrometric (ETAAS)detection. For that purpose, 1-phenylthiosemicarbazide (PTC) was used as chelating agent and undecanol was used asextraction solvent. The pH of solution, extraction solvent volume, amount of ligand, effect of time for complex formation,and effect of possible foreign ions were also evaluated for quantitative and effective extraction of analyte. Under optimizedparameters, detection limit (0.19 g L1), limit of quanti cation (0.60 g L1), relative standard deviation (4.6%),linear range (0.60{24 g L1), relative error ({4.3%), and enrichment factor (53) were calculated, respectively. Theaccuracy of the SFODME method was con rmed with analysis of reference material (LGC 6010 Hard drinking water).The presented method was applied to water samples.

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