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O. I. Shchukina, A. V. Zatirakha, A. D. Smolenkov, O. A. Shpigun

Using of epichlorohydrin for simultaneous increase of functional groups hydrophilicity and their spatial moving away from the matrix of anion exchangers for ion chromatography

Abstract

Novel method of synthesis of the anion exchangers for ion chromatography using epichlorhydrin for hydrophilisation of functional groups and for moving them away from the matrix is proposed. New approach includes the following steps: acylation with acetic anhydride, reductive amination with methylamine hydrochloride, alkylation with epichlorhydrin, amination with dimethylamine and quaternization of terminal aminogroups with epichlorhydrin. The obtained anion exchangers with hydrophilic spacers and hydrophilic functional groups allow to determine eight inorganic anions (F, HCOO, Cl, NO2, Br, NO3, HPO42–, SO42–) simultaneously and demonstrate good selectivity and efficiency of more than 62000 theoretical plates per meter for phosphate ion in the suppressed ion chromatography mode.
Key words: anion exchangers, ion chromatography, polystyrene-divinylbenzene, determination of anions.
Moscow University Chemistry Bulletin.
2014, Vol. 55, No. 4, P. 219
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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