Ion Exchange Chromatography

Walton, Harold F.

doi:10.1021/ac60211a004

Cited by 6 publications

(2 citation statements)

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“…Ion exchange resins are available in various forms, including macroporous or gel-type beads, and contain fixed ionic functional groups in the polymer structure that are neutralized with a counterion. The functional group can be anionic, commonly a sulfate group, for cation exchange, or cationic, typically a quaternary ammonium, for anion exchange . The resin is packed in a column or tube, and a sample solution is flowed through the resin-bed to replace cations in the sample with the cations present in the resin.…”

Section: Introductionmentioning

confidence: 99%

“…The functional group can be anionic, commonly a sulfate group, for cation exchange, or cationic, typically a quaternary ammonium, for anion exchange. 13 The resin is packed in a column or tube, and a sample solution is flowed through the resin-bed to replace cations in the sample with the cations present in the resin. The resin can then be regenerated for multiple uses, improving the cost-effectiveness of this method.…”

Section: ■ Introductionmentioning

confidence: 99%

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Monitoring Ion Exchange Chromatography with Affordable Flame Emission Spectroscopy

2022

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Highlighting the interdisciplinary nature of research, we present a series of experiments for undergraduate lab courses that teach the principles of preparative ion exchange chromatography and flame emission spectroscopy. Through these inquiry-based experiments, the students learn about experimental design and instrument limitations, naturally connecting general chemistry principles with analytical and physical chemistry and materials science. The goal is to devise experimental parameters that allow quantitative ion exchange on a small scale, and to monitor the exchange with optical spectroscopy. The small-footprint, inexpensive flame emission spectroscopy setup we developed can be used to accurately determine relative concentrations of alkali metal ions in a sample, while also being suitable for simpler experiments, which allow it to be employed in a variety of classes. In a demonstration for energy research, we then perform the presented experiments on redox flow battery electrolytes to investigate the influence of the cation choice on battery performance.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%