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Enhanced methodology for porting ion chromatography retention data

journal contribution
posted on 2023-05-19, 02:55 authored by Park, S, Robert ShellieRobert Shellie, Gregory Dicinoski, Schuster, G, Mohammad TalebiMohammad Talebi, Paul HaddadPaul Haddad, Szucs, R, Dolan, JW, Pohl, CA
Porting is a powerful methodology to recalibrate an existing database of ion chromatography (IC) retention times by reflecting the changes of column behavior resulting from either batch-to-batch variability in the production of the column or the manufacture of new versions of a column. This approach has been employed to update extensive databases of retention data of inorganic and organic anions forming part of the "Virtual Column" software marketed by Thermo Fisher Scientific, which is the only available commercial optimization tool for IC separation. The current porting process is accomplished by performing three isocratic separations with two representative analyte ions in order to derive a porting equation which expresses the relationship between old and new data. Although the accuracy of retention prediction is generally enhanced on new columns, errors were observed on some columns. In this work, the porting methodology was modified in order to address this issue, where the porting equation is now derived by using six representative analyte ions (chloride, bromide, iodide, perchlorate, sulfate, and thiosulfate). Additionally, the updated porting methodology has been applied on three Thermo Fisher Scientific columns (AS20, AS19, and AS11HC). The proposed approach showed that the new porting methodology can provide more accurate and robust retention prediction on a wide range of columns, where average errors in retention times for ten test anions under three eluent conditions were less than 1.5%. Moreover, the retention prediction using this new approach provided an acceptable level of accuracy on a used column exhibiting changes in ion-exchange capacity.

Funding

Australian Research Council

Pfizer

Thermo Fisher Scientific Australia

History

Publication title

Journal of Chromatography A

Volume

1436

Pagination

59-63

ISSN

0021-9673

Department/School

School of Natural Sciences

Publisher

Elsevier BV

Place of publication

Netherlands

Rights statement

Crown Copyright 2016

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the chemical sciences

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