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Ion-Selective Sensors and Their Applications

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 6065

Special Issue Editor

Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, 30100 Murcia, Spain
Interests: chemical sensors; ion-selective electrodes; electrochemistry at the interface between two immiscible electrolyte solutions (ITIES)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Ion-selective sensors allow for the determination and monitoring of the activity/concentration of a high number of inorganic and organic ions in different samples, which make them very attractive for their applications in several fields, such as environmental, clinical, pharmaceutical and industrial analyses. Several transduction principles such as potentiometry (ion-selective electrodes), ion-transfer voltammetry, amperometry, coulometry, photometry and fluorimetry have been used. Some research topics include fundamental and mechanistic studies, incorporation of new ionophores, transducer materials for solid-contact ion-selective electrodes, wearable ion-sensors, point-of-care and in-field applications, as well as electronic tongues, among others.

  • This Special Issue covers new research on many of the aspects mentioned above and others related.

Prof. Dr. Joaquín Ángel Ortuño
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Ion sensors
  • Ion-selective electrodes
  • Optical ion sensors
  • Ion amperometry
  • Wearable ion-sensors
  • Solid-contact ion-selective electrodes
  • Electronic tongues

Published Papers (3 papers)

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Research

15 pages, 6560 KiB  
Article
Potentiometric Electronic Tongue for Quantitative Ion Analysis in Natural Mineral Waters
by María Cuartero, Alberto Ruiz, Manuel Galián and Joaquín A. Ortuño
Sensors 2022, 22(16), 6204; https://0-doi-org.brum.beds.ac.uk/10.3390/s22166204 - 18 Aug 2022
Cited by 5 | Viewed by 1350
Abstract
The present paper addresses the development and use of a new potentiometric electronic tongue for both qualitative and quantitative characterization of natural mineral waters. The electronic tongue is particularly related to the conductivity and ion content of/in the water sample. The analytical system [...] Read more.
The present paper addresses the development and use of a new potentiometric electronic tongue for both qualitative and quantitative characterization of natural mineral waters. The electronic tongue is particularly related to the conductivity and ion content of/in the water sample. The analytical system is based on six ion-selective electrodes whose membranes are formulated to provide either cationic or anionic response and considering plasticizers with different dielectric constants (bis(2-ethylhexyl) sebacate, 2-nitrophenyl octyl ether or tricresylphosphate), while keeping the polymeric matrix, i.e., poly(vinyl chloride). Notably, the absence of any ionophore in the membrane provides a general response profile, i.e., no selectivity toward any special ion, which is convenient for the realization of an effective electronic tongue. The dynamic response of the tongue toward water samples of different chemical compositions and geographical locations has been obtained. At the optimized experimental conditions, the tongue presents acceptable repeatability and reproducibility (absence of hysteresis). The principal component analysis of the final potential values observed with the six electrodes allows for the differentiation and classification of the samples according to their conductivity, which is somehow related to the mineralization. Moreover, quantitative determination of the six main ions in the water samples (i.e., chloride, nitrate, hydrogen carbonate, sulfate, sodium, calcium, and magnesium) is possible by means of a simple linear calibration (and cross-validation) model. Full article
(This article belongs to the Special Issue Ion-Selective Sensors and Their Applications)
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10 pages, 7941 KiB  
Article
Constant Potential Coulometric Measurements with Ca2+-Selective Electrode: Analysis Using Calibration Plot vs. Analysis Using the Charge Curve Fitting
by Anna Bondar and Konstantin Mikhelson
Sensors 2022, 22(3), 1145; https://0-doi-org.brum.beds.ac.uk/10.3390/s22031145 - 02 Feb 2022
Cited by 5 | Viewed by 1719
Abstract
The possibility of analysis using charge curve fitting in constant potential coulometric mode instead of using a calibration plot is explored, for the first time. The results are compared with the analysis based on the use of a calibration plot. A Ca2+ [...] Read more.
The possibility of analysis using charge curve fitting in constant potential coulometric mode instead of using a calibration plot is explored, for the first time. The results are compared with the analysis based on the use of a calibration plot. A Ca2+ ion-selective electrode, with and without an electronic capacitor in series, is used as a model system in pure solutions of CaCl2. Both techniques delivered good results (error within 2%) when the final and the initial concentration values differed by not more than three times. Larger differences result in 10–25% error. The presence of an electronic capacitor in the measurement circuit and in series with the electrode, allows for significantly faster response. Full article
(This article belongs to the Special Issue Ion-Selective Sensors and Their Applications)
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11 pages, 3634 KiB  
Communication
Solid-Contact Electrode with Composite PVC-Based 3D-Printed Membrane. Optimization of Fabrication and Performance
by Bartosz Bartoszewicz, Andrzej Lewenstam and Jan Migdalski
Sensors 2021, 21(14), 4909; https://0-doi-org.brum.beds.ac.uk/10.3390/s21144909 - 19 Jul 2021
Cited by 2 | Viewed by 2328
Abstract
Intense interest in reference electrode design and fabrication has recently been enriched with the application of 3D printing of electrodes with salt-loaded PVC membranes. This type of material is attractive in sensor technology and is challenging to implement in 3D. In this report, [...] Read more.
Intense interest in reference electrode design and fabrication has recently been enriched with the application of 3D printing of electrodes with salt-loaded PVC membranes. This type of material is attractive in sensor technology and is challenging to implement in 3D. In this report, several improvements and simplifications in the technology were focused on and supported by a fundamental electrochemical characterization. Full article
(This article belongs to the Special Issue Ion-Selective Sensors and Their Applications)
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