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Article

Dynamic Potentiometry with an Ion-Selective Electrode: A Tool for Qualitative and Quantitative Analysis of Inorganic and Organic Cations

1
Department of Chemical Engineering, University of Murcia, 30100 Murcia, Spain
2
Department of Informatics and Systems, University of Murcia, 30100 Murcia, Spain
3
Department of Analytical Chemistry, University of Murcia, 30100 Murcia, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Johan Bobacka
Chemosensors 2022, 10(3), 116; https://doi.org/10.3390/chemosensors10030116
Received: 8 February 2022 / Revised: 3 March 2022 / Accepted: 16 March 2022 / Published: 18 March 2022
(This article belongs to the Special Issue Modern Directions in Ion Electroanalysis for Real World Applications)
A study of the transient potential signals obtained with a cation-selective electrode based on an ion-exchanger was carried out for solutions of the following individual cations at different concentrations: H+, Li+, Na+, K+, Rb+, Mg2+, Ca2+, choline (Ch+), acetylcholine (AcCh+), and procaine (Pr+). Three different general types of transient signals were distinguished depending on the value of the selectivity coefficient of the corresponding ion. A principal component analysis (PCA) was performed on the signals, finding that the qualitative identification of the corresponding ion from the scores of two principal components is possible. The study was extended to the transient signals of solutions containing an analyte in the presence of an interfering ion. The PCA of the corresponding signal allows for the detection of the presence of interfering ions, thus avoiding biased results in the determination of the analyte. Moreover, the two principal components of the transient signals obtained for each of the ions at different concentrations allow for the construction of calibration graphs for the quantitative determination of the corresponding ion. All the transient signals obtained experimentally in this work can be reconstructed accurately from principal components and their corresponding scores. View Full-Text
Keywords: dynamic potentiometry; transient signals; ion-selective electrode; principal component analysis; choline; acetylcholine; procaine; cations; determination dynamic potentiometry; transient signals; ion-selective electrode; principal component analysis; choline; acetylcholine; procaine; cations; determination
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MDPI and ACS Style

González-Franco, J.A.; Ruiz, A.; Ortuño, J.Á. Dynamic Potentiometry with an Ion-Selective Electrode: A Tool for Qualitative and Quantitative Analysis of Inorganic and Organic Cations. Chemosensors 2022, 10, 116. https://doi.org/10.3390/chemosensors10030116

AMA Style

González-Franco JA, Ruiz A, Ortuño JÁ. Dynamic Potentiometry with an Ion-Selective Electrode: A Tool for Qualitative and Quantitative Analysis of Inorganic and Organic Cations. Chemosensors. 2022; 10(3):116. https://doi.org/10.3390/chemosensors10030116

Chicago/Turabian Style

González-Franco, José A., Alberto Ruiz, and Joaquín Á. Ortuño. 2022. "Dynamic Potentiometry with an Ion-Selective Electrode: A Tool for Qualitative and Quantitative Analysis of Inorganic and Organic Cations" Chemosensors 10, no. 3: 116. https://doi.org/10.3390/chemosensors10030116

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