caa a22 4500 463220609 CHVBK 20180405153210.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1134/S1061934807020025 doi (NATIONALLICENCE)springer-10.1134/S1061934807020025 Solid-phase extractive preconcentration and separation of lanthanum(III) and cerium(III) using a polymer-supported chelating calix [4] arene resin [Elektronische Daten] [V. Jain, R. Pandya, S. Pillai, Y. Agrawal, P. Kanaiya] In the present paper, solid-phase extractive preconcentration and separation of lanthanum(III) and cerium(III) using calix[4]arene-o-vanillinsemicarbazone immobilized on a polymeric matrix, a Merrifield peptide resin, is proposed. The diamino derivative of calix[4]arene was first diazotized and coupled with o-vanillinsemicarbazone to obtain a new "upper-rim” functionalized calix[4]arene-o-vanillinsemicarbazone. It was then covalently linked to the Merrifield peptide resin and characterized by FT-IR and elemental analysis. Quantitative studies were carried out by spectrophotometry and ICP-AES with a relative standard deviation of 1.7%. Various physicochemical parameters like pH, concentration of eluting agents, flow rate, total sorption capacity, metal-ligand stoichiometry, exchange kinetics, preconcentration factor, distribution coefficient, breakthrough capacity, resin stability, and effect of electrolytes and associated metal ions have been studied. The uptake and stripping of these metal ions on the resin was fast, indicating a better accessibility of La(III) and Ce(III) towards the chelating sites. Detection limits corresponded to three times the standard deviation of the blank (3σB) and amounted to 3.05 and 6.86 µg/L, along with preconcentration factors of 153 and 133 for La(III) and Ce(III), respectively. The robustness of the procedure is demonstrated by the recoveries obtained (>97.5%) for La(III) and Ce(III) in the presence of several cations and anions. The proposed method was satisfactorily applied to the separation of La(III) and Ce(III) from each other and also from U(VI) and Th(IV) by sequential acidic elution and varying pH. The validity of the method was tested by analyzing these metal ions in monazite sand and standard geological materials. Pleiades Publishing, Ltd., 2007 Jain V. Chemistry Department, School of Sciences, Gujarat University, 380009, Ahmedabad, India aut Pandya R. Chemistry Department, School of Sciences, Gujarat University, 380009, Ahmedabad, India aut Pillai S. Chemistry Department, School of Sciences, Gujarat University, 380009, Ahmedabad, India aut Agrawal Y. Institute of Pharmacy and Sciences, Nirma University of Science and Technology, Sarkhej Ghandhi Nagar Highway, 382481, Ahmedabad, India aut Kanaiya P. Chemistry Department, School of Sciences, Gujarat University, 380009, Ahmedabad, India aut Journal of Analytical Chemistry Nauka/Interperiodica 62/2(2007-02-01), 104-112 1061-9348 62:2<104 2007 62 10809 https://doi.org/10.1134/S1061934807020025 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807020025 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jain V. Chemistry Department, School of Sciences, Gujarat University, 380009, Ahmedabad, India aut NATIONALLICENCE 700 1- Pandya R. Chemistry Department, School of Sciences, Gujarat University, 380009, Ahmedabad, India aut NATIONALLICENCE 700 1- Pillai S. Chemistry Department, School of Sciences, Gujarat University, 380009, Ahmedabad, India aut NATIONALLICENCE 700 1- Agrawal Y. Institute of Pharmacy and Sciences, Nirma University of Science and Technology, Sarkhej Ghandhi Nagar Highway, 382481, Ahmedabad, India aut NATIONALLICENCE 700 1- Kanaiya P. Chemistry Department, School of Sciences, Gujarat University, 380009, Ahmedabad, India aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/2(2007-02-01), 104-112 1061-9348 62:2<104 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer