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Electrochemical Sensors for Analytical Applications
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Electrochemical Sensors for Analytical Applications

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

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 7718

Special Issue Editors

Dr. Cristina Ariño

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Guest Editor
Departament d’Enginyeria Química i Química Analítica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
Interests: electrochemical sensors; biosensors; multi-sensor arrays; voltammetric techniques; electrochemical detection; chemometrics
Special Issues, Collections and Topics in MDPI journals
Dr. Clara Pérez-Ràfols

E-Mail Website
Guest Editor
Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
Interests: microneedle biosensors; electrochemical sensors; screen-printed devices; electronic tongues; chemometrics; environmental and biomedical analysis
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Julio Bastos-Arrieta

E-Mail Website
Guest Editor
1. Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, 08007 Barcelona, Spain
2. Institut de Recerca de l’Aigua (IdRA), University of Barcelona, 08007 Barcelona, Spain
Interests: nanomaterials; surface chemistry; (nano)electroanalysis; analytical chemistry; environmental analysis; 3D-printing; screen printed sensors; nanoparticles; active colloids; hydrogels; biomaterials; micromotors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The COVID-19 pandemic has made clear how our society requires quickly available analytical tools to detect, screen and address emerging healthcare and environmental issues. In the same context, emerging electrochemical sensing and analytical technologies must meet the demands of wastewater treatment plants, the food and pharmaceutical industry, clinical assays and environmental control agencies. These strategies should provide simple, fast, inexpensive and reliable methodologies for on-site screening, monitoring and analysis that can act as alternative or complementary approaches to more traditional analytical techniques.

With these facts in mind, this Special Issue aims to cover the advances in electrochemical sensors for the reliable, fast, and affordable analytical detection of analytes in different fields of applications. Both research papers and review articles will be considered. We look forward to and welcome your participation in this Special Issue.

Dr. Cristina Ariño
Dr. Clara Pérez-Ràfols
Dr. Julio Bastos-Arrieta
Guest Editors

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

  • electrochemical sensors
  • environmental monitoring
  • chemical analysis
  • emerging pollutants
  • nano-enabled sensors
  • screen printed electrodes
  • 3D printed sensors
  • carbon (nano)allotrope-based sensors
  • biosensors
  • biomonitoring
  • drug analysis
  • (nano)diagnostics
  • instrumental analysis
  • portable analytics
  • wireless sensors
  • wearable sensors
  • real-time sensing

Published Papers (4 papers)

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Research

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16 pages, 2743 KiB  
Article
A Novel Eco-Friendly and Highly Sensitive Solid Lead–Tin Microelectrode for Trace U(VI) Determination in Natural Water Samples
by Iwona Gęca and Mieczyslaw Korolczuk
Sensors 2023, 23(5), 2552; https://doi.org/10.3390/s23052552 - 24 Feb 2023
Viewed by 1106
Abstract
For the first time a solid state lead–tin microelectrode (diameter ϕ 25 µm) was utilized for U(VI) ion determination by adsorptive stripping voltammetry. The described sensor is characterized by high durability, reusability and eco-friendly features, as the need for using lead and tin [...] Read more.
For the first time a solid state lead–tin microelectrode (diameter ϕ 25 µm) was utilized for U(VI) ion determination by adsorptive stripping voltammetry. The described sensor is characterized by high durability, reusability and eco-friendly features, as the need for using lead and tin ions for metal film preplating has been eliminated, and consequently, the amount of toxic waste has been limited. The advantages of the developed procedure resulted also from the utilization of a microelectrode as a working electrode, because a restricted amount of metals is needed for its construction. Moreover, field analysis is possible to perform thanks to the fact that measurements can be carried out from unmixed solutions. The analytical procedure was optimized. The proposed procedure is characterized by two orders of magnitude linear dynamic range of U(VI) determination from 1 × 10−9 to 1 × 10−7 mol L−1 (120 s of accumulation). The detection limit was calculated to be 3.9 × 10−10 mol L−1 (accumulation time of 120 s). RSD% calculated from seven subsequent U(VI) determinations at a concentration of 2 × 10−8 mol L−1 was 3.5%. The correctness of the analytical procedure was confirmed by analyzing a natural certified reference material. Full article
(This article belongs to the Special Issue Electrochemical Sensors for Analytical Applications)
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9 pages, 1843 KiB  
Communication
Electrochemical Analysis of Attoliter Water Droplets in Organic Solutions through Partitioning Equilibrium
by Hyeongkwon Moon and Jun Hui Park
Sensors 2023, 23(4), 2157; https://doi.org/10.3390/s23042157 - 14 Feb 2023
Cited by 1 | Viewed by 1412
Abstract
Herein, we report the electrochemical monitoring of attoliters of water droplets in an organic medium by the electrolysis of an extracted redox species from the continuous phase upon collisional events on an ultramicroelectrode. To obtain information about a redox-free water droplet in an [...] Read more.
Herein, we report the electrochemical monitoring of attoliters of water droplets in an organic medium by the electrolysis of an extracted redox species from the continuous phase upon collisional events on an ultramicroelectrode. To obtain information about a redox-free water droplet in an organic solvent, redox species with certain concentrations need to be contained inside it. The redox species inside the droplet were delivered by a partitioning equilibrium between the organic phase and the water droplets. The mass transfer of the redox species from the surrounding organic phase to the droplet is very fast because of the radial diffusion, which resultantly establishes the equilibrium. Upon the collisional contact between the droplet and the electrode, the extracted redox species in the water droplets were selectively electrolyzed, even though the redox species in the organic continuous phase remained unreacted because of the different solvent environments. The electrolysis of the redox species in the droplets, where the concentration is determined by the equilibrium constant of the redox species in water/oil, can be used to estimate the size of single water droplets in an organic solution. Full article
(This article belongs to the Special Issue Electrochemical Sensors for Analytical Applications)
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11 pages, 2072 KiB  
Communication
An Electrochemical Sensor Based on Electropolymerization of β-Cyclodextrin on Glassy Carbon Electrode for the Determination of Fenitrothion
by Rong Wang, Shulong Wang, Caihong Qin, Qiyang Nie, Yougang Luo, Qi-Pin Qin, Ruijuan Wang, Baiquan Liu and Dongxiang Luo
Sensors 2023, 23(1), 435; https://doi.org/10.3390/s23010435 - 30 Dec 2022
Cited by 5 | Viewed by 1569
Abstract
An electrochemical sensor enabled by electropolymerization (EP) of β-cyclodextrin on glassy carbon electrode (β-CDP/GCE) is built for the determination of fenitrothion (FNT). The effects of the EP cycles, pH value, and enrichment time on the electrochemical response of FNT were studied. With the [...] Read more.
An electrochemical sensor enabled by electropolymerization (EP) of β-cyclodextrin on glassy carbon electrode (β-CDP/GCE) is built for the determination of fenitrothion (FNT). The effects of the EP cycles, pH value, and enrichment time on the electrochemical response of FNT were studied. With the optimum conditions, good linear relationships between the current of the reduction peak of the nitroso derivative of FNT and the concentration are obtained in the range of 10–150 and 150–4000 ng/mL, with a detection limit of 6 ng/mL (S/N = 3). β-CDP/GCE also exhibits a satisfactory applicability in cabbage and tap water, with recovery values between 98.43% and 112%. These outstanding results suggest that β-CDP/GCE could be a new effective alternative for the determination of FNT in real samples. Full article
(This article belongs to the Special Issue Electrochemical Sensors for Analytical Applications)
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Review

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22 pages, 4707 KiB  
Review
Electrochemical (Bio)Sensing Devices for Human-Microbiome-Related Biomarkers
by Esther Sánchez-Tirado, Lourdes Agüí, Araceli González-Cortés, Susana Campuzano, Paloma Yáñez-Sedeño and José Manuel Pingarrón
Sensors 2023, 23(2), 837; https://doi.org/10.3390/s23020837 - 11 Jan 2023
Cited by 3 | Viewed by 2654
Abstract
The study of the human microbiome is a multidisciplinary area ranging from the field of technology to that of personalized medicine. The possibility of using microbiota biomarkers to improve the diagnosis and monitoring of diseases (e.g., cancer), health conditions (e.g., obesity) or relevant [...] Read more.
The study of the human microbiome is a multidisciplinary area ranging from the field of technology to that of personalized medicine. The possibility of using microbiota biomarkers to improve the diagnosis and monitoring of diseases (e.g., cancer), health conditions (e.g., obesity) or relevant processes (e.g., aging) has raised great expectations, also in the field of bioelectroanalytical chemistry. The well-known advantages of electrochemical biosensors—high sensitivity, fast response, and the possibility of miniaturization, together with the potential for new nanomaterials to improve their design and performance—position them as unique tools to provide a better understanding of the entities of the human microbiome and raise the prospect of huge and important developments in the coming years. This review article compiles recent applications of electrochemical (bio)sensors for monitoring microbial metabolites and disease biomarkers related to different types of human microbiome, with a special focus on the gastrointestinal microbiome. Examples of electrochemical devices applied to real samples are critically discussed, as well as challenges to be faced and where future developments are expected to go. Full article
(This article belongs to the Special Issue Electrochemical Sensors for Analytical Applications)
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