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Column selection for comprehensive multidimensional ion chromatography

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posted on 2023-05-16, 23:09 authored by Robert ShellieRobert Shellie, Tyrrell, EC, Pohl, CA, Paul HaddadPaul Haddad
This paper discusses the selection of ion chromatography (IC) columns for use in comprehensive multidimensional ion chromatography (IC×IC). First, a single number was determined for a wide range of anions (one number for each anion) using the linear solvent strength model. These numbers were then used to compare the column selectivity characteristics for five different columns. Principal component analysis was used to illustrate selectivity differences between columns. Dionex AS16 and AS20 columns were selected for use in the development of an IC×IC method for the separation of ten anions. To achieve the required speed of analysis in both the first and second separation dimensions, custom column lengths were packed in-house. The use of an eluent suppressor between the first and second columns permits a relatively low flow ratio regime of only <1:20 in the first and second dimensions, respectively, which reduces dilution effects common in comprehensive multidimensional LC. Selection of the second dimension eluent conditions was aided by the development of a spreadsheet based on the linear solvent strength model. © 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

History

Publication title

Journal of Separation Science

Volume

31

Issue

19

Pagination

3287-3296

ISSN

1615-9306

Department/School

School of Natural Sciences

Publisher

Wiley VCH

Place of publication

Weinheim

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the chemical sciences

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