Selective preconcentration of Lanthanum(III) by Coriolus versicolor immobilised on Amberlite XAD-4 and its determination by ICP-OES |
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Authors: | Sadin Özdemir Veysi Okumuş Abdurrahman Dündar Kadir Serdar Çelik Uyan Yüksel |
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Affiliation: | 1. Department of Biology, Faculty of Arts and Science, University of Siirt, Siirt, Turkey;2. Department of Chemistry, Faculty of Arts and Science, University of Batman, Batman, Turkey;3. Department of Chemistry, Faculty of Arts and Science, University of Siirt, Siirt, Turkey |
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Abstract: | Coriolus versicolor, a wood fungus, was immobilised on Amberlite XAD-4 and used as solid-phase biosorbent for preconcentrations of rare earth elements. La(III), Th(IV), U(IV) and Ce(III) were subjected to solid-phase extraction procedure. We observed that La(III) was selectively preconcentrated, while other ions remained in solution at pH 6.0. 5.0 mL of 1.0 mol L?1 HCl was used to elaute La(III) from column. 250 mg of C. versicolor loaded on 1000 mg of XAD-4 was optimised as solid-phase matrix. Concentrations of ions in solutions were determined by inductively coupled plasma– optical emission spectrometry (ICP-OES). The calibration plot after preconcentration was linear in the range from 1.0 to 50.0 ng mL?1 for La(III). Limit of detection was found as 0.27 ng mL?1 for La(III) by SPE method. Relative standard deviation was found lower than 6.7% for 1.0 ng mL?1 of La(III) solution (n = 10). The sensitivity of ICP-OES was improved by a factor of 46.8. The applicability of the method was validated through the analysis of certified reference samples of tea (NCS ZC-73014) and spinach (NCS ZC-73013). |
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Keywords: | Lanthanum rare earth elements selective preconcentration Coriolus versicolor solid-phase extraction |
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