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A. S. Uzhel, O. I. Shchukina, A. V. Zatirakha, A. D. Smolenkov, O. A. Shpigun
Novel
polymeric resins with heightened hydrophilicity for ion chromatography
Abstract
For increasing efficiency of ion exchangers on the base of styrene and
diviniybenzene copolymer novel method of covalent attachment of quaternary
ammonium functional groups with different hydrophilicity using 1,4-butanediol
diglycidyl ether for moving them away from the matrix is proposed. Synthesis
includes acylation of matrix with acetic anhydride, reductive amination,
alkylation of aminated phase with 1,4-butanediol diglycidyl ether and amination
with trimethylamine and dimethylethanolamine of terminal epoxide ring. Using
dimethylamine and methylamine hydrochloride for reductive amination allows to
obtain linear and branched structure of ion exchange layer respectively. The
obtained anion exchangers allow to determine seven inorganic anions (F–,
Cl–, NO2–, Br–, NO3–,
SO42–,PO43–)
simultaneously in the suppressed ion chromatography mode and ion exchanger with
branched structure and hydrophilic functional group demonstrate the biggest efficiency
of 31000 and 35000 theoretical plates per meter for bromide and nitrite
respectively.
Key words: anion
exchangers, ion chromatography, polystyrene-divinylbenzene, determination of
anions.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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