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Electrochemical Sensors in Environment, Food and Healthcare
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Electrochemical Sensors in Environment, Food and Healthcare

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

Deadline for manuscript submissions: closed (10 March 2024) | Viewed by 3081

Special Issue Editors

Dr. Xishan Guo

E-Mail Website
Guest Editor
Department of Biosystems Engineering, Biosensors National Special Lab., Zhejiang University, Hangzhou 310027, China
Interests: micro-nano chemical/bio sensors; MEMS; micro-acoustic devices; biomedical devices; wearable devices; food safety sensors; environmental sensors
Prof. Dr. Canpeng Li

E-Mail Website
Guest Editor
School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
Interests: biosensor; food safety; macrocyclic supramolecule; biomarker; photo/electrochemical biosensor

Special Issue Information

Dear Colleagues,

Rapid and available analytical tools can effectively detect, screen, and solve emerging medical, food safety, and environmental problems. In recent years, many studies have shown that electrochemical sensors have excellent performance in response time, selectivity, sensitivity, and detection limit. Therefore, simple, fast, cheap, and reliable electrochemical sensors are widely used for on-site screening, monitoring, and analysis in pharmaceutical, environmental, food and agriculture, and industrial fields.

This Special Issue will focus on the advanced research of smart electrochemical sensors. Researchers are welcome to publish original research on the latest findings related to experimental and theoretical aspects of the design and applications of electrochemical sensors. The topics of interest include but are not limited to the following:

  • electrochemical sensors
  • environmental monitoring
  • nano biosensors
  • biomonitoring
  • wearable chem/bio sensors
  • sensing materials
  • flexible sensors

Dr. Xishan Guo
Prof. Dr. Canpeng Li
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.

Published Papers (3 papers)

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Research

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17 pages, 2619 KiB  
Article
A New Planar Potentiometric Sensor for In Situ Measurements
by Nikola Lenar, Robert Piech and Beata Paczosa-Bator
Sensors 2024, 24(8), 2492; https://doi.org/10.3390/s24082492 - 12 Apr 2024
Viewed by 434
Abstract
A new construction of a potentiometric sensor was introduced for the first time. It relies on the use of two membranes instead of one, as in the well-known coated-disc electrode. For this purpose, a new electrode body was constructed, including not one, but [...] Read more.
A new construction of a potentiometric sensor was introduced for the first time. It relies on the use of two membranes instead of one, as in the well-known coated-disc electrode. For this purpose, a new electrode body was constructed, including not one, but two glassy carbon discs covered with an ion-selective membrane. This solution allows for the sensor properties to be enhanced without using additional materials (layers or additives) on the membrane. The new construction is particularly useful for in situ measurements in environmental samples. Two ion-selective polymeric membranes were used, namely H+ and K+-selective membranes, to confirm the universality of the idea. The tests conducted included chronopotentiometric tests, electrochemical impedance spectroscopy, and potentiometric measurements. The electrical and analytical parameters of the sensors were evaluated and compared for all tested electrodes to evaluate the properties of the planar electrode versus previously known constructions. Research has shown that the application of two membranes instead of one allows for the resistance of an electrode to be lowered and for the electrical capacitance to be elevated. Improving the electrical properties of an electrode resulted in the enhancement of its analytical properties. The pH measurement range of the planar electrode is 2–11, which is much wider in contrast to that of the single-membrane electrode. The linear range of the K+-selective planar electrode is wider than that of the coated-disc electrode and equals 10−6 to 10−1 M. The response time turned out to be a few seconds shorter, and the potential drift was smaller due to the application of an additional membrane in the electrode construction. This research creates a new opportunity to design robust potentiometric sensors, as the presented construction is universal and can be used to obtain electrodes selective to various ions. Full article
(This article belongs to the Special Issue Electrochemical Sensors in Environment, Food and Healthcare)
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17 pages, 13948 KiB  
Article
Influence of Coal-Fired Fly Ash on Measurement Error of NO2 Electrochemical Sensors
by Wei Chen, Hui Zhou, Shijing Wu and Dongmei Liao
Sensors 2024, 24(3), 900; https://doi.org/10.3390/s24030900 - 30 Jan 2024
Viewed by 659
Abstract
To overcome the limitations of NO2 electrochemical sensors, including their inaccurate measurements and short working life, when used around coal-fired power plants, we investigated the influence of coal-fired fly ash deposition on the measurement error of NO2 electrochemical sensors through experimental [...] Read more.
To overcome the limitations of NO2 electrochemical sensors, including their inaccurate measurements and short working life, when used around coal-fired power plants, we investigated the influence of coal-fired fly ash deposition on the measurement error of NO2 electrochemical sensors through experimental tests. The morphological characteristics and pellet diameter distribution of coal-fired fly ash pellets were determined via scanning electron microscopy. The sedimentation velocity of coal-fired fly ash pellets in the air was determined through theoretical calculations of aerodynamics and hydrodynamics. Additionally, the effect of the deposition of coal-fired fly ash on the measurement error of NO2 electrochemical sensors was determined through experimental tests. The test results show that the minimum and maximum measurement errors of the NO2 electrochemical gas sensor were 8.015% and 30.35%, respectively, after a deposition duration of 30 days with 30 mg/m3 coal-fired fly ash. This demonstrates that coal-fired fly ash deposition is the cause of the inaccurate measurements and short working life of these sensors. Coal-fired fly ash causes a decrease in the gas diffusion area of the sensor and the diffusion coefficient, thus increasing the sensor measurement error. Full article
(This article belongs to the Special Issue Electrochemical Sensors in Environment, Food and Healthcare)
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Review

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19 pages, 2440 KiB  
Review
An Overview to Molecularly Imprinted Electrochemical Sensors for the Detection of Bisphenol A
by Ying Pan, Mengfan Wu, Mingjiao Shi, Peizheng Shi, Ningbin Zhao, Yangguang Zhu, Hassan Karimi-Maleh, Chen Ye, Cheng-Te Lin and Li Fu
Sensors 2023, 23(20), 8656; https://doi.org/10.3390/s23208656 - 23 Oct 2023
Cited by 1 | Viewed by 1293
Abstract
Bisphenol A (BPA) is an industrial chemical used extensively in plastics and resins. However, its endocrine-disrupting properties pose risks to human health and the environment. Thus, accurate and rapid detection of BPA is crucial for exposure monitoring and risk mitigation. Molecularly imprinted electrochemical [...] Read more.
Bisphenol A (BPA) is an industrial chemical used extensively in plastics and resins. However, its endocrine-disrupting properties pose risks to human health and the environment. Thus, accurate and rapid detection of BPA is crucial for exposure monitoring and risk mitigation. Molecularly imprinted electrochemical sensors (MIES) have emerged as a promising tool for BPA detection due to their high selectivity, sensitivity, affordability, and portability. This review provides a comprehensive overview of recent advances in MIES for BPA detection. We discuss the operating principles, fabrication strategies, materials, and methods used in MIES. Key findings show that MIES demonstrate detection limits comparable or superior to conventional methods like HPLC and GC-MS. Selectivity studies reveal excellent discrimination between BPA and structural analogs. Recent innovations in nanomaterials, novel monomers, and fabrication techniques have enhanced sensitivity, selectivity, and stability. However, limitations exist in reproducibility, selectivity, and stability. While challenges remain, MIES provide a low-cost portable detection method suitable for on-site BPA monitoring in diverse sectors. Further optimization of sensor fabrication and characterization will enable the immense potential of MIES for field-based BPA detection. Full article
(This article belongs to the Special Issue Electrochemical Sensors in Environment, Food and Healthcare)
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