On-line trace metal ion preconcentration in ion chromatography using carboxymethyl and hydroxamate dextran-coated silicas

While dextrans have cation binding properties, their chemical modification to carboxymethyl and hydroxamate dextrans increase the degree of metal ion chelation. This paper describes recent findings on the use of dextran coated silica materials for the on-line preconcentration of metal ions in ion ch...

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Bibliographic Details
Published in:Analytica chimica acta 1993-11, Vol.283 (1), p.344-349
Main Authors: Ryan, N., Glennon, J.D., Muller, D.
Format: Article
Language:English
Subjects:
Atomic absorption spectrometry
Dextrans
Ion chromatography
Preconcentration
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Summary:While dextrans have cation binding properties, their chemical modification to carboxymethyl and hydroxamate dextrans increase the degree of metal ion chelation. This paper describes recent findings on the use of dextran coated silica materials for the on-line preconcentration of metal ions in ion chromatography. Results presented include the effects of flow-rate and pH on metal ion uptake and elution, metal ion complexation capacities and applications to trace metal analysis in aqueous environmental samples.
ISSN:0003-2670
1873-4324
DOI:10.1016/0003-2670(93)85242-C