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Humic acid capillary zone electrophoresis adsorption on capillary walls, separation in metal ion supplemented buffer and the fingerprints

✍ Scribed by David Fetsch; Martin Fetsch; Eladia M. Peña Mendéz; Prof. Josef Havel

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
842 KB
Volume
19
Category
Article
ISSN
0173-0835

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✦ Synopsis

Humic acid capillary zone electrophoresis adsorption on capillary walls, separation in metal ion supplemented buffer and the fingerprints

Capillary zone electrophoresis (CZE) in quartz tubes is often being used for the separation and characterization of humic acids (HA). A method was found to follow adsorption (and kinetics) of humic acids on a fused-silica capillary wall. It was shown that the adsorption of humic acids on an uncoated capillary wall is high. The effect on sorption of additives to the background electrolyte (BGE) was studied. Sorption can be eliminated by adding magnesium(I1) salts (14-50 mM) to the BGE (pH 3.40) with resultant highly reproducible electropherograms as well as detailed and expressive fingerprints for HA of different origin.

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✍ C. Vogt; S. Conradi 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 717 KB

The separation of lanthanides by capillary zone electrophoresis is carried out by addition of a complex forming agent to the separation buffer, thus generating charge and mobility differences between the species. The choice of a suitable ligand and especially the precalculation of the optimum ligand