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In this study, a simple, sensitive and accurate method was developed for the determination of lead ion by combining ionic liq- uid dispersive liquid-liquid extraction (il-dlle) with flame atomic absorption spectrometry. Tetraethylthiuram disulfide (tetd), acetone and 1-octyl-3-methylimidazolium hexafluorophosphate ((C8mim) (PF6)) were used as the chelating agent, dispersive and extraction solvent, respectively. Under the optimal conditions, the calibration graph was linear in the range of 5-190 μg L −1 of lead and the detection limit was 0.8 μg L −1 with a sample volume of 200 mL. The proposed method was validated by the analysis of one certified reference mate- rial and applied successfully to the determination of lead in real water samples.

Determination of Trace Amount of Lead in Industrial and Municipal Effluent Water Samples Based on Dispersive Liquid-Liquid Extraction