Amperometry

Amine, Aziz; Mohammadi, Hasna

doi:10.1016/b978-0-12-409547-2.14204-0

Cited by 22 publications

(23 citation statements)

References 114 publications

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“…The electrochemical techniques employed in wound biomarker detection are represented by amperometric, voltammetric and impedimetric methods. Amperometric methods rely on the application of a constant potential to the working electrode and the measurement of the generated current that is proportional to the analyte concentration [ 33 , 34 ]. Amperometric methods have been mainly employed in wearable sensors for the detection of UA [ 9 , 35 , 36 , 37 ], but also for the detection of oxygen or lactate [ 38 ].…”

Section: Detection Methods For Wound Infection Biomarkersmentioning

confidence: 99%

Wearable Sensors for the Detection of Biomarkers for Wound Infection

et al. 2021

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Infection represents a major complication that can affect wound healing in any type of wound, especially in chronic ones. There are currently certain limitations to the methods that are used for establishing a clinical diagnosis of wound infection. Thus, new, rapid and easy-to-use strategies for wound infection diagnosis need to be developed. To this aim, wearable sensors for infection diagnosis have been recently developed. These sensors are incorporated into the wound dressings that are used to treat and protect the wound, and are able to detect certain biomarkers that can be correlated with the presence of wound infection. Among these biomarkers, the most commonly used ones are pH and uric acid, but a plethora of others (lactic acid, oxygenation, inflammatory mediators, bacteria metabolites or bacteria) have also been detected using wearable sensors. In this work, an overview of the main types of wearable sensors for wound infection detection will be provided. These sensors will be divided into electrochemical, colorimetric and fluorimetric sensors and the examples will be presented and discussed comparatively.

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Section: Detection Methods For Wound Infection Biomarkersmentioning

confidence: 99%

Wearable Sensors for the Detection of Biomarkers for Wound Infection

et al. 2021

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“…These sensors display high sensitivity, a wide detection range, short response time, and selectively between several electroactive species in solution [ 42 ]. In a chronoamperometry, the obtained current is related to the bulk concentration of the electroactive species according to the Cottrell Equation (2) as follows:

where i corresponds to the diffusion current (A), t is the electrolysis time (s), n is the number of electrons involved in the reaction, A is the electrode area (cm 2 ), D is the diffusion coefficient (cm 2 s −1 ), F is the Faraday constant and C is the concentration of the electroactive species (mol L −1 ) [ 76 ].…”

Section: Fundamentals Of the Electrochemical Sensorsmentioning

confidence: 99%

Electrochemical Sensors Based on Conducting Polymers for the Aqueous Detection of Biologically Relevant Molecules

et al. 2021

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Electrochemical sensors appear as low-cost, rapid, easy to use, and in situ devices for determination of diverse analytes in a liquid solution. In that context, conducting polymers are much-explored sensor building materials because of their semiconductivity, structural versatility, multiple synthetic pathways, and stability in environmental conditions. In this state-of-the-art review, synthetic processes, morphological characterization, and nanostructure formation are analyzed for relevant literature about electrochemical sensors based on conducting polymers for the determination of molecules that (i) have a fundamental role in the human body function regulation, and (ii) are considered as water emergent pollutants. Special focus is put on the different types of micro- and nanostructures generated for the polymer itself or the combination with different materials in a composite, and how the rough morphology of the conducting polymers based electrochemical sensors affect their limit of detection. Polypyrroles, polyanilines, and polythiophenes appear as the most recurrent conducting polymers for the construction of electrochemical sensors. These conducting polymers are usually built starting from bifunctional precursor monomers resulting in linear and branched polymer structures; however, opportunities for sensitivity enhancement in electrochemical sensors have been recently reported by using conjugated microporous polymers synthesized from multifunctional monomers.

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“…and varying p in range [2,20]. As shown in Table 1, the evolution of the variables to optimize (time and error) is proportional; therefore, a balance must be reached in a way that favors minimizing the error, even though time saving is penalized.…”

Section: Optimal Parameters For Filteringmentioning

confidence: 99%

“…The biological element recognizes the target to be analyzed selectively and this interaction is translated into current by the transducer [ 1 ]. Amperometric detection consists of a polarization of the electrode by a fixed potential and recording the current due to the electrochemical transformation (RedOx reaction) of the targeted analyte [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Measurement Time Reduction by Means of Mathematical Modeling of Enzyme Mediated RedOx Reaction in Food Samples Biosensors

Florez

Murga

Zarate

et al. 2021

Sensors

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The possibility of measuring in real time the different types of analytes present in food is becoming a requirement in food industry. In this context, biosensors are presented as an alternative to traditional analytical methodologies due to their specificity, high sensitivity and ability to work in real time. It has been observed that the behavior of the analysis curves of the biosensors follow a trend that is reproducible among all the measurements and that is specific to the reaction that occurs in the electrochemical cell and the analyte being analyzed. Kinetic reaction modeling is a widely used method to model processes that occur within the sensors, and this leads to the idea that a mathematical approximation can mimic the electrochemical reaction that takes place while the analysis of the sample is ongoing. For this purpose, a novel mathematical model is proposed to approximate the enzymatic reaction within the biosensor in real time, so the output of the measurement can be estimated in advance. The proposed model is based on adjusting an exponential decay model to the response of the biosensors using a nonlinear least-square method to minimize the error. The obtained results show that our proposed approach is capable of reducing about 40% the required measurement time in the sample analysis phase, while keeping the error rate low enough to meet the accuracy standards of the food industry.

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Amperometry

Cited by 22 publications

References 114 publications

Wearable Sensors for the Detection of Biomarkers for Wound Infection

Wearable Sensors for the Detection of Biomarkers for Wound Infection

Electrochemical Sensors Based on Conducting Polymers for the Aqueous Detection of Biologically Relevant Molecules

Measurement Time Reduction by Means of Mathematical Modeling of Enzyme Mediated RedOx Reaction in Food Samples Biosensors

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