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Addressing the Detection of Ammonium Ion in Environmental Water Samples via Tandem Potentiometry–Ion Chromatography

[Image: see text] An analytical methodology for detecting ammonium ion (NH(4)(+)) in environmental water through potentiometry–ion chromatography (IC) in tandem is presented here. A multielectrode flow cell is implemented as a potentiometric detector after chromatographic separation of cations in th...

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Autores principales: Gil, Renato L., Amorim, Célia G., Cuartero, Maria
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9204817/
https://www.ncbi.nlm.nih.gov/pubmed/35726251
http://dx.doi.org/10.1021/acsmeasuresciau.1c00056
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author Gil, Renato L.
Amorim, Célia G.
Cuartero, Maria
author_facet Gil, Renato L.
Amorim, Célia G.
Cuartero, Maria
author_sort Gil, Renato L.
collection PubMed
description [Image: see text] An analytical methodology for detecting ammonium ion (NH(4)(+)) in environmental water through potentiometry–ion chromatography (IC) in tandem is presented here. A multielectrode flow cell is implemented as a potentiometric detector after chromatographic separation of cations in the sample. The electrodes are fabricated via miniaturized all-solid-state configuration, using a nonactin-based plasticized polymeric membrane as the sensing element. The overall analytical setup is based on an injection valve, column, traditional conductometric detector, and new potentiometric detector (in that order), permitting the characterization of the analytical performance of the potentiometric detector while validating the results. The limit of detection was found to be ca. 3 × 10(–7) M NH(4)(+) concentration after linearization of the potentiometric response, and intra- and interelectrode variations of <10% were observed. Importantly, interference from other cations was suppressed in the tandem potentiometry–IC, and thus, the NH(4)(+) content in fresh- and seawater samples from different locations was successfully analyzed. This analytical technology demonstrated a great potential for the reliable monitoring of NH(4)(+) at micromolar levels, in contrast to the conductivity detector and previously reported NH(4)(+) potentiometric sensors functioning in batch mode or even coupled with IC. Additionally, the suitability of the potentiometric cell for selective multi-ion analysis in the same sample, i.e., Na(+), NH(4)(+), and K(+) in water, has been proven.
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spelling pubmed-92048172022-06-18 Addressing the Detection of Ammonium Ion in Environmental Water Samples via Tandem Potentiometry–Ion Chromatography Gil, Renato L. Amorim, Célia G. Cuartero, Maria ACS Meas Sci Au [Image: see text] An analytical methodology for detecting ammonium ion (NH(4)(+)) in environmental water through potentiometry–ion chromatography (IC) in tandem is presented here. A multielectrode flow cell is implemented as a potentiometric detector after chromatographic separation of cations in the sample. The electrodes are fabricated via miniaturized all-solid-state configuration, using a nonactin-based plasticized polymeric membrane as the sensing element. The overall analytical setup is based on an injection valve, column, traditional conductometric detector, and new potentiometric detector (in that order), permitting the characterization of the analytical performance of the potentiometric detector while validating the results. The limit of detection was found to be ca. 3 × 10(–7) M NH(4)(+) concentration after linearization of the potentiometric response, and intra- and interelectrode variations of <10% were observed. Importantly, interference from other cations was suppressed in the tandem potentiometry–IC, and thus, the NH(4)(+) content in fresh- and seawater samples from different locations was successfully analyzed. This analytical technology demonstrated a great potential for the reliable monitoring of NH(4)(+) at micromolar levels, in contrast to the conductivity detector and previously reported NH(4)(+) potentiometric sensors functioning in batch mode or even coupled with IC. Additionally, the suitability of the potentiometric cell for selective multi-ion analysis in the same sample, i.e., Na(+), NH(4)(+), and K(+) in water, has been proven. American Chemical Society 2022-01-20 /pmc/articles/PMC9204817/ /pubmed/35726251 http://dx.doi.org/10.1021/acsmeasuresciau.1c00056 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Gil, Renato L.
Amorim, Célia G.
Cuartero, Maria
Addressing the Detection of Ammonium Ion in Environmental Water Samples via Tandem Potentiometry–Ion Chromatography
title Addressing the Detection of Ammonium Ion in Environmental Water Samples via Tandem Potentiometry–Ion Chromatography
title_full Addressing the Detection of Ammonium Ion in Environmental Water Samples via Tandem Potentiometry–Ion Chromatography
title_fullStr Addressing the Detection of Ammonium Ion in Environmental Water Samples via Tandem Potentiometry–Ion Chromatography
title_full_unstemmed Addressing the Detection of Ammonium Ion in Environmental Water Samples via Tandem Potentiometry–Ion Chromatography
title_short Addressing the Detection of Ammonium Ion in Environmental Water Samples via Tandem Potentiometry–Ion Chromatography
title_sort addressing the detection of ammonium ion in environmental water samples via tandem potentiometry–ion chromatography
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9204817/
https://www.ncbi.nlm.nih.gov/pubmed/35726251
http://dx.doi.org/10.1021/acsmeasuresciau.1c00056
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