Potentiometric Sensing

Zdrachek, Elena; Bakker, Eric

doi:10.1021/acs.analchem.0c04249

Cited by 117 publications

(93 citation statements)

References 199 publications

(361 reference statements)

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“…Historically, measurements with ISEs were done at an open circuit potential, but over the last few decades, the application was extended by applying an external current or potential control [79]. These tools are investigated in the detection of a large variety of contaminants such as ammonium [80], copper sulfate [81] and heavy metals [82].…”

Section: Comparison Of Electrochemical Techniquesmentioning

confidence: 99%

Towards Clean and Safe Water: A Review on the Emerging Role of Imprinted Polymer-Based Electrochemical Sensors

Zheng

Khaoulani

Ktari³

et al. 2021

Sensors

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This review critically summarizes the knowledge of imprinted polymer-based electrochemical sensors for the detection of pesticides, metal ions and waterborne pathogenic bacteria, focusing on the last five years. MIP-based electrochemical sensors exhibit low limits of detection (LOD), high selectivity, high sensitivity and low cost. We put the emphasis on the design of imprinted polymers and their composites and coatings by radical polymerization, oxidative polymerization of conjugated monomers or sol-gel chemistry. Whilst most imprinted polymers are used in conjunction with differential pulse or square wave voltammetry for sensing organics and metal ions, electrochemical impedance spectroscopy (EIS) appears as the chief technique for detecting bacteria or their corresponding proteins. Interestingly, bacteria could also be probed via their quorum sensing signaling molecules or flagella proteins. If much has been developed in the past decade with glassy carbon or gold electrodes, it is clear that carbon paste electrodes of imprinted polymers are more and more investigated due to their versatility. Shortlisted case studies were critically reviewed and discussed; clearly, a plethora of tricky strategies of designing selective electrochemical sensors are offered to “Imprinters”. We anticipate that this review will be of interest to experts and newcomers in the field who are paying time and effort combining electrochemical sensors with MIP technology.

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Section: Comparison Of Electrochemical Techniquesmentioning

confidence: 99%

Towards Clean and Safe Water: A Review on the Emerging Role of Imprinted Polymer-Based Electrochemical Sensors

Zheng

Khaoulani

Ktari³

et al. 2021

Sensors

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“…The last section discusses aspects related to chemical interfacing in the design of MIP-based chemosensors. Reviews from 2020 and 2021 already described various characteristics related to MIP synthesis and the readout mode of MIP-based potentiometric sensors for the detection of organic and biological species [18], the advantages of nanomaterial-based MIPs for pesticides sensing [19], and the strength/weakness ratio for potentiometric sensors in general [20], which are not tackled in this work.…”

Section: Introductionmentioning

confidence: 99%

Molecularly Imprinted Polymers for Chemical Sensing: A Tutorial Review

et al. 2021

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The field of molecularly imprinted polymer (MIP)-based chemosensors has been experiencing constant growth for several decades. Since the beginning, their continuous development has been driven by the need for simple devices with optimum selectivity for the detection of various compounds in fields such as medical diagnosis, environmental and industrial monitoring, food and toxicological analysis, and, more recently, the detection of traces of explosives or their precursors. This review presents an overview of the main research efforts made so far for the development of MIP-based chemosensors, critically discusses the pros and cons, and gives perspectives for further developments in this field.

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“…The potential stability and reproducibility of SC-ISEs are known to be determined by the properties of the ion-toelectron transducer layer. Within this context, the estimation of its capacitance has therefore become an essential part of its characterization, as demonstrated by the fact that 30 of the 46 publications dedicated to SC-ISEs that were cited in a review paper describing progress in the potentiometric sensing in the last 2 years [20] included capacitance estimation results.…”

Section: Introductionmentioning

confidence: 99%

Ion-to-electron capacitance of single-walled carbon nanotube layers before and after ion-selective membrane deposition

Zdrachek

Bakker

2021

Microchim Acta

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The capacitance of the ion-to-electron transducer layer helps to maintain a high potential stability of solid-contact ion-selective electrodes (SC-ISEs), and its estimation is therefore an essential step of SC-ISE characterization. The established chronopotentiometric protocol used to evaluate the capacitance of the single-walled carbon nanotube transducer layer was revised in order to obtain more reliable and better reproducible values and also to allow capacitance to be measured before membrane deposition for electrode manufacturing quality control purposes. The capacitance values measured with the revised method increased linearly with the number of deposited carbon nanotube–based transducer layers and were also found to correlate linearly before and after ion-selective membrane deposition, with correlation slopes close to 1 for nitrate-selective electrodes, to 0.7 and to 0.5 for potassium- and calcium-selective electrodes. Graphical abstract

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Potentiometric Sensing

Cited by 117 publications

References 199 publications

Towards Clean and Safe Water: A Review on the Emerging Role of Imprinted Polymer-Based Electrochemical Sensors

Towards Clean and Safe Water: A Review on the Emerging Role of Imprinted Polymer-Based Electrochemical Sensors

Molecularly Imprinted Polymers for Chemical Sensing: A Tutorial Review

Ion-to-electron capacitance of single-walled carbon nanotube layers before and after ion-selective membrane deposition

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