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Published on: July 20, 2021
Fabrication and evaluation of an electrodialytic carbonate eluent generator for ion chromatography
Guobin Shen1, Yifei Lu1, Feifei Chen1
1School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
Abstract:
An electrodialytic potassium carbonate eluent generator and its associated potassium bicarbonate eluent generator have been fabricated for ion chromatography (IC). The device can withstand high backpressure up to ∼32MPa and no observable leakage under such pressure is found during 2h. In the range of 0-13.7mM, potassium carbonate concentration can be generated linearly with the applied current with a slope that is essentially Faradaic. At least 10mM potassium carbonate can be online changed into 10mM potassium bicarbonate via a potassium bicarbonate eluent generator, which offers an easy way to manipulate the separation selectivity. When coupled with IC system, the device demonstrated good reproducibility indicated by less than 0.52% of the relative standard deviation of the retention times.
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