Issue 6, 2016

Usability of online-coupling ion exchange chromatography ICP-AES/-MS for the determination of trivalent metal complex species under acidic conditions

Abstract

The determination of metal complex species in aqueous solutions by using chromatographic techniques is potentially affected or even impossible due to species decomposition during the separation. An often used technique for slower exchanging metal ions is ion exchange chromatography (IC), which is used for the separation and quantification of 1-1-complexes of trivalent metal ions. The test set consisted of chelating agents F, Ox2−, NTA3− and EDTA4−, differing in their denticity, and the trivalent metals ions of Cr, Al, Fe, Ga, In and lanthanoids differing in their ligand exchange rate. It became apparent that the ligand exchange rate of the metal ion and the denticity of the chelator both play an important role. For slow exchanging metals and/or high denticity ligands, IC is a suitable tool for the determination of species distributions. A simple empirical equation is given to distinguish between inert, e.g. suitable for chromatographic separations, and labile 1-1-complexes of trivalent metal ions by using their complex formation constants and the aqua ligand exchange rate of the metal ions.

Graphical abstract: Usability of online-coupling ion exchange chromatography ICP-AES/-MS for the determination of trivalent metal complex species under acidic conditions

Article information

Article type
Paper
Submitted
07 Dec 2015
Accepted
18 Apr 2016
First published
19 Apr 2016
This article is Open Access
Creative Commons BY-NC license

J. Anal. At. Spectrom., 2016,31, 1262-1268

Author version available

Usability of online-coupling ion exchange chromatography ICP-AES/-MS for the determination of trivalent metal complex species under acidic conditions

C. Winter and A. Seubert, J. Anal. At. Spectrom., 2016, 31, 1262 DOI: 10.1039/C5JA00480B

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements