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Updated: Jun 20, 2026

Using a Cyclic Ion Mobility Spectrometer for Tandem Ion Mobility Experiments
Published on: January 20, 2022
Two-dimensional ion chromatography using tandem ion-exchange columns with gradient-pulse column switching.
Cameron Johns1, Robert A Shellie, Christopher A Pohl
1Australian Centre for Research on Separation Science, School of Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia.
A novel two-dimensional ion chromatography (2D-IC) method enhances complex sample separation using two columns with independent eluent control. This advanced technique achieves high resolution for inorganic anions in under 28 minutes.
Area of Science:
- Analytical Chemistry
- Chromatography Science
Background:
- Single-column ion chromatography (IC) faces limitations in resolving complex mixtures.
- Enhanced resolution is crucial for accurate analysis of diverse analytes.
Purpose of the Study:
- To develop a two-dimensional ion chromatography (2D-IC) approach for superior sample resolution.
- To demonstrate the method's efficacy in separating complex mixtures of inorganic anions.
Main Methods:
- Utilized a 2D-IC system with two columns featuring different stationary phases, connected via a tee-piece.
- Implemented independent eluent flow and concentration control for each column.
- Employed a gradient pulse for analyte transfer and optimized eluent profiles for rapid separation.
Main Results:
- Achieved high resolution (separation factor > 1.3) for 18 inorganic anions.
- Completed separations in under 28 minutes, including re-equilibration.
- Demonstrated high repeatability (RSD 0.01-0.12% for retention times) and efficiency (8,000-260,000 plates).
Conclusions:
- The developed 2D-IC method significantly improves resolution for complex samples compared to single-column approaches.
- The system offers rapid, repeatable, and efficient separation of inorganic anions.
- The technique provides a powerful tool for advanced chromatographic analysis.
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