A microextraction procedure based on a task‐specific ionic liquid for the separation and preconcentration of lead ions from red lipstick and pine leaves |
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| Authors: | Asma Saljooqi Tayebeh Shamspur Maryam Mohamadi Daryoush Afzali Ali Mostafavi |
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| Affiliation: | 1. Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran;2. Young Research Society, Shahid Bahonar University of Kerman, Kerman, Iran;3. Department of Environment, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran |
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| Abstract: | First, the extraction and preconcentration of ultratrace amounts of lead(II) ions was performed using microliter volumes of a task‐specific ionic liquid. The remarkable properties of ionic liquids were added to the advantages of microextraction procedure. The ionic liquid used was trioctylmethylammonium thiosalicylate, which formed a lead thiolate complex due to the chelating effect of the ortho‐positioned carboxylate relative to thiol functionality. So, trioctylmethylammonium thiosalicylate played the roles of both chelating agent and extraction solvent simultaneously. Hence, there is no need to use a ligand. The main parameters affecting the efficiency of the method were investigated and optimized. Under optimized conditions, this approach showed a linear range of 2.0–24.0 ng/mL with a detection limit of 0.0010 ng/mL. The proposed method was applied to the extraction and preconcentration of lead from red lipstick and pine leaves samples prior to electrothermal atomic absorption spectroscopic determination. |
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| Keywords: | Electrothermal atomic absorption spectroscopy Lead Microextraction Preconcentration Task‐specific ionic liquids |
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