Abstract
A novel method for the synthesis of anion exchangers for ion chromatography that provides the covalent attachment and spatial movement of the ion-exchange layer away from the silica surface is proposed. The new approach includes the following steps: alkylation of aminated silica with 1,4-butanediol diglycidyl ether and then amination using polyethyleneimine. The obtained anion exchanger allows the simultaneous separation of 11 anions (C2H5COO−, CH3COO−, HCOO−, BrO −3 , Cl−,NO −2 Br−, NO −3 I−, SCN−, ClO −4 ) in 18 minutes and demonstrates good efficiency (up to 62,000 TP/m for I-) in the single column ion chromatography mode with indirect UV-detection using potassium hydrogen phthalate as an eluent.
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Original Russian Text © A.A. Loshin, A.V. Zatirakha, A.D. Smolenkov, O.A. Shpigun, 2014, published in Vestnik Moskovskogo Universiteta. Khimiya, 2014, No. 6, pp. 327–336.
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Loshin, A.A., Zatirakha, A.V., Smolenkov, A.D. et al. A novel covalently modified aminated silica-based anion exchanger for ion chromatography. Moscow Univ. Chem. Bull. 69, 245–253 (2014). https://doi.org/10.3103/S0027131414060030
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DOI: https://doi.org/10.3103/S0027131414060030