Potentiometry for the determination of oxidant activity

Брайнина, Х. З.; Zaharov, A. S.; Vidrevich, Marina B.

doi:10.1039/c6ay01106c

Cited by 14 publications

(10 citation statements)

References 33 publications

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“…A balance of metabolic redox species comprising ROS and antioxidants maintain the cellular physiological metabolic functions in plants and animals at a steady state [ 4 ]. Due to both endogenous and exogenous causes, an imbalance of these redox species can lead to cellular oxidative stress [ 5 , 6 ]. To maintain physiological metabolic balance, the natural antioxidant defense system can inhibit the oxidation of ROS, thus preventing the release of free radicals [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Research has been conducted in the development of non-invasive platforms for redox potential monitoring due to their desirability. For instance, Brainina et al, 2016 [ 5 ], demonstrated a gel impregnated with the K 3 [Fe(CN) 6 ]/K 4 [Fe(CN) 6 ] redox couple (RC) that was taped on the skin for monitoring oxidant and antioxidant activity. In their study [ 5 ], CV was employed to record the anodic and cathodic response of K 3 [Fe(CN) 6 ]/K 4 [Fe(CN) 6 ] RC relative to the concentration of the oxidants and antioxidants.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, Brainina et al, 2016 [ 5 ], demonstrated a gel impregnated with the K 3 [Fe(CN) 6 ]/K 4 [Fe(CN) 6 ] redox couple (RC) that was taped on the skin for monitoring oxidant and antioxidant activity. In their study [ 5 ], CV was employed to record the anodic and cathodic response of K 3 [Fe(CN) 6 ]/K 4 [Fe(CN) 6 ] RC relative to the concentration of the oxidants and antioxidants. The reaction scheme of this process is illustrated in Figure 1 .…”

Section: Introductionmentioning

confidence: 99%

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A Multipurpose and Multilayered Microneedle Sensor for Redox Potential Monitoring in Diverse Food Analysis

Mugo

Dhanjai

et al. 2022

Biosensors

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This work presents a multipurpose and multilayered stainless steel microneedle sensor for the in situ redox potential monitoring in food and drink samples, termed MN redox sensor. The MN redox sensor was fabricated by layer-by-layer (LbL) approach. The in-tube multilayer coating comprised carbon nanotubes (CNTs)/cellulose nanocrystals (CNCs) as the first layer, polyaniline (PANI) as the second layer, and the ferrocyanide redox couple as the third layer. Using cyclic voltammetry (CV) as a transduction method, the MN redox sensor showed facile electron transfer for probing both electrical capacitance and redox potential, useful for both analyte specific and bulk quantification of redox species in various food and drink samples. The bulk redox species were quantified based on the anodic/cathodic redox peak shifts (Ea/Ec) on the voltammograms resulting from the presence of redox-active species. The MN redox sensor was applied to detect selected redox species including ascorbic acid, H2O2, and putrescine, with capacitive limits of detection (LOD) of 49.9, 17.8, and 263 ng/mL for each species, respectively. For the bulk determination of redox species, the MN redox sensor displayed LOD of 5.27 × 103, 55.4, and 25.8 ng/mL in ascorbic acid, H2O2, and putrescine equivalents, respectively. The sensor exhibited reproducibility of ~ 1.8% relative standard deviation (%RSD). The MN redox sensor was successfully employed for the detection of fish spoilage and antioxidant quantification in king mushroom and brewed coffee samples, thereby justifying its potential for food quality and food safety applications. Lastly, the portability, reusability, rapid sampling time, and capability of in situ analysis of food and drink samples makes it amenable for real-time sensing applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Multipurpose and Multilayered Microneedle Sensor for Redox Potential Monitoring in Diverse Food Analysis

Mugo

Dhanjai

et al. 2022

Biosensors

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“…Redox state of a given redox-active species quantitatively defined by the ratio of the oxidized (Ox) and reduced (Red) form is important in many areas of classical analytical chemistry such as potentiometry and coulometry [1,2], in chronoamperometry and voltammetry, as well as for the operation of the electrochemical sensors [3][4][5][6]. The system containing both components of a single redox couple Ox/Red has been studied under conditions of various voltammetric techniques [7][8][9][10][11][12][13], considering both reversible and quasi-reversible electrode reactions in order to understand voltammetric features and to find a method for determination of the concentration ratio of the two redox forms.…”

Section: Introductionmentioning

confidence: 99%

Square‐wave Voltammetry and Electrochemical Faradaic Spectroscopy of a Reversible Electrode Reaction: Determination of the Concentration Fraction of the Redox Couple

2021

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A comparative study conducted with square‐wave voltammetry (SWV) and electrochemical faradaic spectroscopy (EFS) is presented for a reversible electrode reaction of dissolved redox couple in the presence of both Ox and Red components. In agreement with previous studies, the net peak current ΔΨp of the theoretical SW voltammograms is positioned at the formal potential E0′ and does not depend on the concentration ratio c(Ox)/c(Red). However the forward‐to‐backward peak current ratio is sensitive to the redox state. For very low SW amplitudes, theoretical data imply superior features of EFS over SWV. Theoretical and experimental calibration lines are in good agreement within the interval 0.2≤x(Ox)≤0.8.

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“…The potentiometric method is one part of the electrometry technique. This method uses the principle of measuring electrical potential using several electrodes [14], [15], [16], [17]. The working electrodes used in this technique can use carbon paste electrodes (CPE) which can be modified with a polymer film on its surface to increase its sensitivity and selectivity.…”

Section: Introductionmentioning

confidence: 99%

Modification of Carbon Paste Electrode with Molecularly Imprinted Poly(Gluthamic Acid) for Determination of Rhodamine: A Preliminary Study

Setiyanto¹,

Ferizal²,

Azis³

et al. 2020

Proceedings of the Proceedings of the 7th Mathematics, Science, and Computer Science Education International Seminar, MSCEIS 20

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The modification of carbon paste electrode (CPE) with molecularly imprinted polymer (MIP) for the determination of rhodamine-B by potentiometry method has been studied. The experiments were performed using glutamic acid as a monomer. The composition of monomers, the number of electropolymerization cycles and pH of the solution were used to describe modification electrodes made (CPE-MIP's) and the electrode characteristics were evaluated. It was observed the amount of oxidation current signal increase with increasing glutamic acid concentration. The optimal polymerization molar ratio of the functional monomer to the template molecule rhodamine-B was 3:1; the maximum number of electropolymerization was 15 and the optimum pH of supporting electrolyte solution was 4.

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Potentiometry for the determination of oxidant activity

Abstract: This paper aims to describe a new approach to using potentiometry for determining oxidants in liquids and ozonized and chlorinated water, in particular.

Cited by 14 publications

References 33 publications

A Multipurpose and Multilayered Microneedle Sensor for Redox Potential Monitoring in Diverse Food Analysis

A Multipurpose and Multilayered Microneedle Sensor for Redox Potential Monitoring in Diverse Food Analysis

Square‐wave Voltammetry and Electrochemical Faradaic Spectroscopy of a Reversible Electrode Reaction: Determination of the Concentration Fraction of the Redox Couple

Modification of Carbon Paste Electrode with Molecularly Imprinted Poly(Gluthamic Acid) for Determination of Rhodamine: A Preliminary Study

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