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Use of a Polymer Inclusion Membrane and a Chelating Resin for the Flow-Based Sequential Determination of Copper(II) and Zinc(II) in Natural Waters and Soil Leachates

A bi-parametric sequential injection method for the determination of copper(II) and zinc(II) when present together in aqueous samples was developed. This was achieved by using a non-specific colorimetric reagent (4-(2-pyridylazo)resorcinol, PAR) together with two ion-exchange polymeric materials to...

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Autores principales: Ribas, Tânia C. F., Croft, Charles F., Almeida, M. Inês G. S., Mesquita, Raquel B. R., Kolev, Spas D., Rangel, António O. S. S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7662993/
https://www.ncbi.nlm.nih.gov/pubmed/33142737
http://dx.doi.org/10.3390/molecules25215062
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author Ribas, Tânia C. F.
Croft, Charles F.
Almeida, M. Inês G. S.
Mesquita, Raquel B. R.
Kolev, Spas D.
Rangel, António O. S. S.
author_facet Ribas, Tânia C. F.
Croft, Charles F.
Almeida, M. Inês G. S.
Mesquita, Raquel B. R.
Kolev, Spas D.
Rangel, António O. S. S.
author_sort Ribas, Tânia C. F.
collection PubMed
description A bi-parametric sequential injection method for the determination of copper(II) and zinc(II) when present together in aqueous samples was developed. This was achieved by using a non-specific colorimetric reagent (4-(2-pyridylazo)resorcinol, PAR) together with two ion-exchange polymeric materials to discriminate between the two metal ions. A polymer inclusion membrane (PIM) and a chelating resin (Chelex 100) were the chosen materials to retain zinc(II) and copper(II), respectively. The influence of the flow system parameters, such as composition of the reagent solutions, flow rates and standard/sample volume, on the method sensitivity were studied. The interference of several common metal ions was assessed, and no significant interferences were observed (<10% signal deviation). The limits of detection were 3.1 and 5.6 µg L(−1) for copper(II) and zinc(II), respectively; the dynamic working range was from 10 to 40 µg L(−1) for both analytes. The newly developed sequential injection analysis (SIA) system was applied to natural waters and soil leachates, and the results were in agreement with those obtained with the reference procedure.
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spelling pubmed-76629932020-11-14 Use of a Polymer Inclusion Membrane and a Chelating Resin for the Flow-Based Sequential Determination of Copper(II) and Zinc(II) in Natural Waters and Soil Leachates Ribas, Tânia C. F. Croft, Charles F. Almeida, M. Inês G. S. Mesquita, Raquel B. R. Kolev, Spas D. Rangel, António O. S. S. Molecules Article A bi-parametric sequential injection method for the determination of copper(II) and zinc(II) when present together in aqueous samples was developed. This was achieved by using a non-specific colorimetric reagent (4-(2-pyridylazo)resorcinol, PAR) together with two ion-exchange polymeric materials to discriminate between the two metal ions. A polymer inclusion membrane (PIM) and a chelating resin (Chelex 100) were the chosen materials to retain zinc(II) and copper(II), respectively. The influence of the flow system parameters, such as composition of the reagent solutions, flow rates and standard/sample volume, on the method sensitivity were studied. The interference of several common metal ions was assessed, and no significant interferences were observed (<10% signal deviation). The limits of detection were 3.1 and 5.6 µg L(−1) for copper(II) and zinc(II), respectively; the dynamic working range was from 10 to 40 µg L(−1) for both analytes. The newly developed sequential injection analysis (SIA) system was applied to natural waters and soil leachates, and the results were in agreement with those obtained with the reference procedure. MDPI 2020-10-31 /pmc/articles/PMC7662993/ /pubmed/33142737 http://dx.doi.org/10.3390/molecules25215062 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ribas, Tânia C. F.
Croft, Charles F.
Almeida, M. Inês G. S.
Mesquita, Raquel B. R.
Kolev, Spas D.
Rangel, António O. S. S.
Use of a Polymer Inclusion Membrane and a Chelating Resin for the Flow-Based Sequential Determination of Copper(II) and Zinc(II) in Natural Waters and Soil Leachates
title Use of a Polymer Inclusion Membrane and a Chelating Resin for the Flow-Based Sequential Determination of Copper(II) and Zinc(II) in Natural Waters and Soil Leachates
title_full Use of a Polymer Inclusion Membrane and a Chelating Resin for the Flow-Based Sequential Determination of Copper(II) and Zinc(II) in Natural Waters and Soil Leachates
title_fullStr Use of a Polymer Inclusion Membrane and a Chelating Resin for the Flow-Based Sequential Determination of Copper(II) and Zinc(II) in Natural Waters and Soil Leachates
title_full_unstemmed Use of a Polymer Inclusion Membrane and a Chelating Resin for the Flow-Based Sequential Determination of Copper(II) and Zinc(II) in Natural Waters and Soil Leachates
title_short Use of a Polymer Inclusion Membrane and a Chelating Resin for the Flow-Based Sequential Determination of Copper(II) and Zinc(II) in Natural Waters and Soil Leachates
title_sort use of a polymer inclusion membrane and a chelating resin for the flow-based sequential determination of copper(ii) and zinc(ii) in natural waters and soil leachates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7662993/
https://www.ncbi.nlm.nih.gov/pubmed/33142737
http://dx.doi.org/10.3390/molecules25215062
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