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A. V. Ivanov
Chromatofocusing
of metal ions on chelating sorbent tetren-SiO2 using the simple
eluents
Abstract
The simple eluents, consisting of tri- or tetrabasic acids solutions
(citric and pyromellytic acids and a number of complexon acids –
nitriltriacetic (NTA), ethylenediaminetetraacetic (EDTA),
cyclohexane-1,2-diamine-N,N,N,N-tetraacetic (CDTA)) or their two-component
mixtures were applied in the first time for chromatofocusing of metal ions on
chelating sorbent Tetren-SiO2 (Silohrom S-120 c
with bonded tetraethylene pentamine groups). The smoother, quasi-linear pH
gradients were formed for eluents, consisting of citric acid and EDTA mixture.
The separation of Mn2+, Cr3+, Co2+ and Ni2+
were achieved using the simple two-component eluent.
Key words:
chromatofocusing, internal pH gradient, chelating sorbent, simple eluent,
separation of metal ions.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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