Abstract
A rapid, sensitive, precise, and accurate dispersive-magnetic solid-phase extraction technique combined with flame atomic absorption spectrometry was established for pre-concentration and separation of Pd (II) in soil samples. In the developed system, 5-amine-1,10-phenanthroline was used as synergistic complexant; sodium dodecyl sulfate and 2-(5-bromo-2-pyridylazo)-5-diethyl aminophenol ligand coated on magnetic nanoparticles were synthesized by a chemical precipitation method, and then employed as the efficient magnetic adsorbent with good magnetic properties and dispersibility. Various operational parameters affecting the extraction efficiency has been studied and optimized in details. Under the optimum experimental conditions, the detection limit of the mentioned method for palladium ions was 0.12 μg/L, while the relative standard deviation was 1.8%. Finally, the developed method was applied for the analysis of palladium ions in three kinds of soil samples and quantitative recoveries were achieved over the range of 96.7–104.0%. It can be a powerful alternative applied to the determination of traces of Pd ions from various real samples in further researches.
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This research was supported by the National Natural Science Foundation of China (grant number 21265025) and the Analysis and Testing Foundation (No. 2017M20152118084) of Kunming University of Science and Technology.
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Wang, M., Wu, L., Hu, Q. et al. Application of magnetic nanoparticles coated with sodium dodecyl sulfate and modified with 2-(5-bromo-2-pyridylazo)-5-diethyl aminophenol as a novel adsorbent for dispersive-magnetic solid-phase extraction and determination of palladium in soil samples. Environ Sci Pollut Res 25, 8340–8349 (2018). https://doi.org/10.1007/s11356-017-1126-4
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DOI: https://doi.org/10.1007/s11356-017-1126-4