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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.
Moscow University Chemistry Bulletin.
2007, Vol. 48, No. 5, P. 352
   

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