Application of a dynamically coated sorbent and conductimetric and UV detectors to the determination of alkaline earth and transition metal cations

The separation of alkaline earth and transition metal cations was performed on the reversed-phase sorbent Silasorb C 18 modified under static conditions with dodecylbenzenesulphonic acid and cetyltrimethylammonium bromide. Mixtures of ethylenediamine, citric acid and tartric acid without addition of...

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Bibliographic Details
Published in:Journal of Chromatography A 1994-06, Vol.671 (1), p.29-32
Main Authors: Litvina, M.L., Voloschik, I.N., Rudenko, B.A.
Format: Article
Language:English
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Summary:The separation of alkaline earth and transition metal cations was performed on the reversed-phase sorbent Silasorb C 18 modified under static conditions with dodecylbenzenesulphonic acid and cetyltrimethylammonium bromide. Mixtures of ethylenediamine, citric acid and tartric acid without addition of an ion-pair reagent and of dipicolinic and oxalic acid with an ion-pair reagent were used as eluents. The selective separation of twelve cations (Fe 3+, Cu 2+ , Ni 2+, Zn 2+, Pb 2+, Co 2+, Cd 2+, Fe 2+, Mg 2+, Ca 2+, Sr 2+ and Ba 2+) in 15 min was obtained. The lifetime of this dynamically coated column was found to exceed that of a column packed with silica gel with sulphonic functional groups.
ISSN:0021-9673
DOI:10.1016/0021-9673(94)80217-3