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T. N. Kas’ynova , A. D. Smolenkov, A. V. Pirogov, O. A. Shpigun
Mobile phases for
determination of the polarizable anions on the polystyrene-divinylbenzene-based
anion exchangers
Abstract
Styrene-divinylbenzene-based
anion exchangers with cross-linking degree 50% have been prepared. The
synthesis includes a chloromethylation procedure of the matrix and its further
amination. It was found that polarizable anions exhibit very strong non-ionic
interactions with the matrix of the anion exchangers. The problem can be eliminated
by the addition substances, which are able to block adsorption sites on the
surface of the stationary phase, into the mobile phase. It was shown that an
addition 0.15 mM p-hydroxybenzonitrile to the carbonate/bicarbonate eluent
increases the efficiency of nitrate peak from 820 to 5100 theoretical plates
per meter.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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