Automated Programmable Preparation of Carbonate-Bicarbonate Eluents for Ion Chromatography with Pressurized Carbon Dioxide
| Autor: | Kenji Yoshikawa, Purnendu K. Dasgupta, C. Phillip Shelor |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Chromatography
Bicarbonate 010401 analytical chemistry Ion chromatography Carbon dioxide removal 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound Column chromatography Membrane chemistry Carbon dioxide Carbonate Hydroxide 0210 nano-technology |
| Zdroj: | Analytical Chemistry. 89:10063-10070 |
| ISSN: | 1520-6882 0003-2700 |
| Popis: | We introduce a novel carbonate–bicarbonate eluent generation system in which CO2 is introduced using programmable CO2 pressures across a membrane into a flowing solution of electrodialytically generated high purity KOH. Many different gradient types are possible, including situations where gradients are run both on the [KOH] and the CO2 pressure. The system is more versatile than current electrodialytic carbonate eluent generators and can easily generate significantly higher eluent concentrations (at least to 40 mM carbonate), paving the way for future higher capacity columns. Demonstrably purer carbonate–bicarbonate eluent systems are possible compared to manually prepared carbonate–bicarbonate eluents and with considerable savings in time. Performance in different modes is examined. The dissolved CO2 is removed by a carbon dioxide removal device prior to detection. Best case noise levels are within a factor of 2–3 of best case suppressed hydroxide eluent operation. The eluent system allows particular la... |
| Databáze: | OpenAIRE |
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