Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5138805 | Journal of Trace Elements in Medicine and Biology | 2017 | 8 Pages |
Abstract
2-(3-Ethylthioureido)benzoic acid was prepared and characterized by electronic spectrum, elemental analysis, Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance spectrum and mass spectrum. The produced ligand was applied for the preconcentrative of Fe3+, Co2+, Cu2+ and Zn2+ in aqueous samples by cloud point extraction methodology. Triton X-114 was used as extractant. Experimental parameters that may affect the extraction process were examined and optimized; such as pH, ligand and triton concentrations, type of diluting solvent, extraction temperature and ionic strength. The calibration curves were linear upto 500 μg Lâ1 for Fe3+, Cu2+ and Zn2+ and upto 200 μg Lâ1 for Co2+. The achieved detection limits were 1.5, 0.23, 0.71 and 0.35 μg Lâ1 for Fe3+, Co2+, Cu2+ and Zn2+ respectively. The accuracy was established by analysis of certified reference materials (Seronorm whole blood L2 and ZCS ZC85006 Tomato). The proposed procedure was used for preconcentration of these metal ions in water, biological and food samples prior to their determination by flame atomic absorption spectrometry.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
W.I. Mortada, I.M.M. Kenawy, M.H. Abdel-Rhman, G.G. El-Gamal, S.M.N. Moalla,