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A gas-free electrodialytic pH modifier for ion chromatography

We for the first time describe a gas-free electrodialytic pH modifier deployed at the pump outlet side to manipulate carbonate eluent used for ion chromatography (IC). It is in sandwich configured, in which the central eluent channel is spatially isolated from two outer regenerant chambers by a stac...

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Detalles Bibliográficos
Autores principales: Zhou, Yue, Sun, Yue, Zhang, Feifang, Yang, Bingcheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7881222/
https://www.ncbi.nlm.nih.gov/pubmed/33615013
http://dx.doi.org/10.1016/j.heliyon.2021.e06229
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author Zhou, Yue
Sun, Yue
Zhang, Feifang
Yang, Bingcheng
author_facet Zhou, Yue
Sun, Yue
Zhang, Feifang
Yang, Bingcheng
author_sort Zhou, Yue
collection PubMed
description We for the first time describe a gas-free electrodialytic pH modifier deployed at the pump outlet side to manipulate carbonate eluent used for ion chromatography (IC). It is in sandwich configured, in which the central eluent channel is spatially isolated from two outer regenerant chambers by a stacked cation exchange membranes (sCEM) and a bipolar membrane (BPM) plus a stacked anion exchange membranes (sAEM) (BPM-sAEM), the cation exchange side of BPM is facing the central channel (the cathode direction). One electrode is put in each regenerant chamber and the sCEM side is cathode with respect to the anode of BPM-sAEM side. When a potassium carbonate eluent is pumped into the central channel and a DC current is applied, a controlled amount of potassium ions will be removed by migrating across sCEM into cathodic chamber. Meanwhile, hydronium ions generated from enhanced water splitting at the intermediate layer of BPM will electromigrate into central channel to form bicarbonate. By controlling the current, the potassium carbonate eluent can be manipulated to obtain a mixed eluent with different ratio of carbonate and bicarbonate. At least 10 mM K(2)CO(3) eluent can be online changed modified into 10 mM KHCO(3) with near-ideal Faradaic efficiency (∼92%). The device demonstrated good reproducibility, as indicated by retention time of relative standard deviation (RSD) < 0.43% and the peak area of RSD <0.93%.
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spelling pubmed-78812222021-02-18 A gas-free electrodialytic pH modifier for ion chromatography Zhou, Yue Sun, Yue Zhang, Feifang Yang, Bingcheng Heliyon Research Article We for the first time describe a gas-free electrodialytic pH modifier deployed at the pump outlet side to manipulate carbonate eluent used for ion chromatography (IC). It is in sandwich configured, in which the central eluent channel is spatially isolated from two outer regenerant chambers by a stacked cation exchange membranes (sCEM) and a bipolar membrane (BPM) plus a stacked anion exchange membranes (sAEM) (BPM-sAEM), the cation exchange side of BPM is facing the central channel (the cathode direction). One electrode is put in each regenerant chamber and the sCEM side is cathode with respect to the anode of BPM-sAEM side. When a potassium carbonate eluent is pumped into the central channel and a DC current is applied, a controlled amount of potassium ions will be removed by migrating across sCEM into cathodic chamber. Meanwhile, hydronium ions generated from enhanced water splitting at the intermediate layer of BPM will electromigrate into central channel to form bicarbonate. By controlling the current, the potassium carbonate eluent can be manipulated to obtain a mixed eluent with different ratio of carbonate and bicarbonate. At least 10 mM K(2)CO(3) eluent can be online changed modified into 10 mM KHCO(3) with near-ideal Faradaic efficiency (∼92%). The device demonstrated good reproducibility, as indicated by retention time of relative standard deviation (RSD) < 0.43% and the peak area of RSD <0.93%. Elsevier 2021-02-10 /pmc/articles/PMC7881222/ /pubmed/33615013 http://dx.doi.org/10.1016/j.heliyon.2021.e06229 Text en © 2021 Published by Elsevier Ltd. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Research Article
Zhou, Yue
Sun, Yue
Zhang, Feifang
Yang, Bingcheng
A gas-free electrodialytic pH modifier for ion chromatography
title A gas-free electrodialytic pH modifier for ion chromatography
title_full A gas-free electrodialytic pH modifier for ion chromatography
title_fullStr A gas-free electrodialytic pH modifier for ion chromatography
title_full_unstemmed A gas-free electrodialytic pH modifier for ion chromatography
title_short A gas-free electrodialytic pH modifier for ion chromatography
title_sort gas-free electrodialytic ph modifier for ion chromatography
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7881222/
https://www.ncbi.nlm.nih.gov/pubmed/33615013
http://dx.doi.org/10.1016/j.heliyon.2021.e06229
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