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(Electro)chemical and Optical (Bio)sensing Devices for Decentralized Cost-Effective (Bio)chemical Monitoring
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(Electro)chemical and Optical (Bio)sensing Devices for Decentralized Cost-Effective (Bio)chemical Monitoring

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

Deadline for manuscript submissions: 15 May 2024 | Viewed by 2254

Special Issue Editor

Dr. Pablo Giménez-Gómez

E-Mail Website
Guest Editor
Department of Materials and Environmental Chemistry, Stockholm University, Frescativägen, 114 19 Stockholm, Sweden
Interests: lab-on-a-chip system; optical and electrochemical sensors; microfluidics; detection of food/beverage industry; environmental control; clinical diagnostics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The selective monitoring of analytes in a precise and affordable way plays a key role in different fields, such as the environmental control, the food industry’s quality control, or clinical diagnostics. Standard methods of detection are highly sensitive, but they also have some drawbacks when used in the field. They require sample preservation and transportation to laboratories, and specialized equipment used by trained personnel require long analysis times and extensive sample preparation, making them ineffective for on-site and on-time analysis. Therefore, the development of cost-effective portable systems for (bio)chemical analysis can greatly improve the effectiveness of current quality monitoring programs. These systems will allow on-site analysis in remote locations or, if rapid analysis is required, without the need for extensive sample preparation or transportation, reducing the risk of sample degradation and providing real-time results.

To tackle the challenge of this precise monitoring, this Special Issue seeks papers on the development of novel, low-cost, sustainable, and easy-to-use ground-breaking technologies for decentralized monitoring of (bio)chemical parameters of interest in clinical diagnostics, environmental control, food quality control, or others. Unprecedented strategies for the easy and decentralized control of analytes, including sensing and/or microfluidics, enabling the detection and monitoring of key analytes, regardless of the accessibility of the area, will be considered for this Special Issue.

Dr. Pablo Giménez-Gómez
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

  • decentralized monitoring
  • affordable sensing systems
  • low-cost and easy to use portable devices

Published Papers (2 papers)

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Research

13 pages, 1674 KiB  
Article
A Novel Polymeric Membrane Sensor for Chlorhexidine Determination
by Joanna Lenik and Karolina Sokal
Sensors 2023, 23(23), 9508; https://doi.org/10.3390/s23239508 - 29 Nov 2023
Viewed by 647
Abstract
In the present work, potentiometric sensors with polymer membranes used for chlorhexidine (CHXD) determination were developed. The polymer membranes were plasticized with bis(2-ethylheksyl)sebacate (DOS) or 2-nitrophenyloctyl ether (o-NPOE). The active compounds used in the membrane were cyclodextrins, crown ethers, and ion [...] Read more.
In the present work, potentiometric sensors with polymer membranes used for chlorhexidine (CHXD) determination were developed. The polymer membranes were plasticized with bis(2-ethylheksyl)sebacate (DOS) or 2-nitrophenyloctyl ether (o-NPOE). The active compounds used in the membrane were cyclodextrins, crown ethers, and ion exchangers. The best-constructed electrode was based on neutral heptakis(2,3,6-tri-O-benzoyl)-β-cyclodextrin with lipophilic salt (KTpClBP)—potassium tetrakis(4-chlorophenyl) borate—dissolved in plasticizer, DOS. The presented electrode is characterized by an average cationic slope of 30.9 ± 2.9 mV decade−1 within a linear range of 1 × 10−6 to 1 × 10−3 mol × L−1, while the value of the correlation coefficient is 0.9970 ± 0.0026. The response time was about 5 s when increasing the sample concentration and about 10 s when diluting the sample. The electrode potential is independent of the pH within a range of 4.0–9.5. The polymeric membrane sensor was successfully applied for assays of chlorhexidine digluconate in pure samples and pharmaceutical samples. The relative error from three replicate measurements was determined to be 1.1%. and the accuracy was RSD = 0.3–1.1%. Full article
(This article belongs to the Special Issue (Electro)chemical and Optical (Bio)sensing Devices for Decentralized Cost-Effective (Bio)chemical Monitoring)
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12 pages, 2472 KiB  
Article
A Time-Division Multiplexing Multi-Channel Micro-Electrochemical Workstation with Carbon-Based Material Electrodes for Online L-Trosine Detection
by Qiwen Bao, Gang Li, Zhengchun Yang, Jun Wei, Wenbo Cheng, Zilian Qu and Ling Lin
Sensors 2023, 23(14), 6252; https://doi.org/10.3390/s23146252 - 09 Jul 2023
Cited by 1 | Viewed by 1202
Abstract
In the background of the rapid development of artificial intelligence, big data, IoT, 5G/6G, and other technologies, electrochemical sensors pose higher requirements for high-throughput detection. In this study, we developed a workstation with up to 10 channels, which supports both parallel signal stimulation [...] Read more.
In the background of the rapid development of artificial intelligence, big data, IoT, 5G/6G, and other technologies, electrochemical sensors pose higher requirements for high-throughput detection. In this study, we developed a workstation with up to 10 channels, which supports both parallel signal stimulation and online electrochemical analysis functions. The platform was wired to a highly integrated Bluetooth chip used for wireless data transmission and can be visualized on a smartphone. We used this electrochemical test platform with carbon–graphene oxide/screen-printed carbon electrodes (CB-GO/SPCE) for the online analysis of L-tyrosine (Tyr), and the electrochemical performance and stability of the electrodes were examined by differential pulse voltammetry (DPV). The CB-GO-based screen-printed array electrodes with a multichannel electrochemical platform for Tyr detection showed a low detection limit (20 μM), good interference immunity, and 10-day stability in the range of 20–200 μM. This convenient electrochemical analytical device enables high-throughput detection and has good economic benefits that can contribute to the improvement of the accuracy of electrochemical analysis and the popularization of electrochemical detection methods in a wide range of fields. Full article
(This article belongs to the Special Issue (Electro)chemical and Optical (Bio)sensing Devices for Decentralized Cost-Effective (Bio)chemical Monitoring)
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