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Reversed-phase chromatography of alkaline earths on paper treated with di-(2-ethylhexyl) orthophosphoric acid in chloride medium

Authors
Journal
Journal of Chromatography A
0021-9673
Publisher
Elsevier
Publication Date
Volume
15
Identifiers
DOI: 10.1016/s0021-9673(01)82774-6

Abstract

Abstract Reversed-phase chromatography of alkaline earth metals on paper treated with di-(2-ethylhexyl) orthophosphoric acid (HDEHP) has been investigated, using hydrochloric acid as eluent in a range of concentrations from 10 M to 1 · 10 −4 M. The quantity (I R F —1) has been related to the hydrogen ion concentration in the mobile phase, and to the effective HDEHP concentration on the paper. The chromatographic behavious has been correlated with that of liquid—liquid extraction systems. Chromatographic separations of alkaline earths from each other, and from other cations, were performed. Two of them were obtained with acetic acid elutions.

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