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Chelation ion chromatography of trace metal ions using metallochromic ligands
journal contribution
posted on 2023-05-16, 11:37 authored by Brett PaullBrett Paull, Paul HaddadPaul HaddadHydrophobic metallochromic ligands can be used to coat high-performance reversed-phase substrates producing chelating stationary phases with the capacity to separate metal ions. To date the main approaches have been to ‘pre-coat' the substrate with the ligand and use it with a mobile phase containing an inorganic salt or alternatively to include the ligand itself within the mobile phase, where the ligand forms a ‘dynamic coating' on the stationary phase, which exhibits retention characteristics similar to the above pre-coated columns. The latter approach offers certain advantages, including increased column capacity, improved separation efficiency, differing selectivity, and the ability to exploit the ligand present in the mobile phase for the visible detection of the eluting metal ions. Here, the two techniques are compared, with the above differences illustrated and explained in terms of retention mechanisms and mobile/stationary phase effects.
History
Publication title
TrAC - Trends in Analytical ChemistryVolume
18Pagination
107-114ISSN
0165-9936Department/School
School of Natural SciencesPublisher
Elsevier SciencePlace of publication
The NetherlandsRights statement
The definitive version is available at http://www.sciencedirect.comRepository Status
- Restricted