Indirect electrochemical determination of antioxidant capacity with hexacyanoferrate(III) reduction using a gold nanoparticle-coated<i>o</i>-phenylenediamine-aniline copolymer electrode

Arman, Aysu; Üzer, Ayşem; Sağlam, Şener; Erçağ, Erol; Apak, Reşat

doi:10.1080/00032719.2018.1536137

Cited by 14 publications

(11 citation statements)

References 69 publications

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“…As a rule, to determine the integral AOA/concentration of the object under study, the indicator electrodes are manufactured by screen printing using carbon or Pt pastes [6,34,[36][37][38][39] or new materials, for example, carbon veil [40]. In a number of works, to improve the quality of the electrode, nanomaterials are deposited on its surface [41][42][43][44][45][46][47][48][49][50].…”

Section: Sensorsmentioning

confidence: 99%

Electrochemical Hybrid Methods and Sensors for Antioxidant/Oxidant Activity Monitoring and Their Use as a Diagnostic Tool of Oxidative Stress: Future Perspectives and Challenges

Брайнина

Kazakov

2020

Chemosensors

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The terminology used in electrochemical methods which are used to generate the measured signal in antioxidant/oxidant activity (AOA/OA) sensors is briefly considered. The review presents a hybrid version of electrochemical methods for the determination of AOA/OA. Invasive electrochemical methods/sensors for AOA/OA of blood/serum/plasma, and non-invasive ones for semen, sweat, saliva and skin determination are described. AOA/OA sensors application in health estimation, cosmetology, food and nutrients is presented. Attention is paid to widely described approaches and technologies used in chemical/biochemical sensors. It will be considered as base/prototypes for developing sensors of the kind for AOA/OA determination. Prospects for the development of wearable, written sensors and biosensors are considered. Miniature and wireless sensors will allow for the monitoring of the patient’s state, both at the bedside and far beyond the hospital. The development of wearable self-powered written and printed sensors is an important step towards personalized medicine.

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Section: Sensorsmentioning

confidence: 99%

Electrochemical Hybrid Methods and Sensors for Antioxidant/Oxidant Activity Monitoring and Their Use as a Diagnostic Tool of Oxidative Stress: Future Perspectives and Challenges

Брайнина

Kazakov

2020

Chemosensors

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“…The transition metal ion reducing capacity of antioxidants can be measured with CUPRAC (Cupric Reducing Antioxidant Capacity) [14,15] and FRAP (Ferric Ion Reducing Antioxidant Power) assays [16][17][18][19]. Many alternative spectrophotometric [20][21][22][23] and voltammetric methods [24,25] were later developed, based on different mechanisms of antioxidant and radical scavenging action. With the advancement of nanoscience, many new methods are on the rise due to extraordinary physico-chemical properties of nanoparticles, such as large surface-to-volume ratio for enhanced catalysis and surface plasmon resonance absorption giving rise to high sensitivity.…”

Section: •−mentioning

confidence: 99%

“…To prepare the green tea sample, 50 mL boiled water was added to 0.5 g of green tea and let to stand for 15 min for infusion [25]. Then, the final solution was passed through filter paper and diluted to 50 mL with ultrapure water.…”

Section: Preparation Of Solutionsmentioning

confidence: 99%

“…As real samples, orange juice and green tea were analyzed with the proposed method, and the results were calculated in trolox equivalents (TE) as defined in the literature [24,25]. The antioxidant capacity of orange juice, and green tea were found as 2.33 mmol TE L -1 , and 1.23 mmol TE g -1 , respectively.…”

Section: Analysis Of Synthetic Antioxidant Mixtures and Real Samplesmentioning

confidence: 99%

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Magnetite nanoparticles−based hydroxyl radical scavenging activity assay of antioxidants using N, N-dimethyl-p-phenylenediamine probe

Can¹,

Keskin²,

Arda³

et al. 2020

Turk J Chem

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Excessive amounts of reactive oxygen species (ROS), unless counterbalanced by antioxidants, can cause cellular damage under oxidative stress conditions; therefore, antioxidative defenses against ROS must be measured. With the development of nanotechnology, nanoparticles have found numerous applications in science, health, and industries. Magnetite nanoparticles (Fe3O4:MNPs) have attracted attention because of their peroxidase-like activity. In this study, hydroxyl radicals (•OH) generated by MNPs-catalyzed degradation of H2O2 converted the N,N-dimethyl-p-phenylenediamine (DMPD) probe into its colored DMPD•+ radical cation, which gave an absorbance maximum at λ = 553 nm. In the presence of antioxidants, •OH was partly scavenged by antioxidants and produced less DMPD•+, causing a decrease in the 553 nm-absorbance. Antioxidant concentrations were calculated with the aid of absorbance differences between the reference and sample solutions. The linear working ranges and trolox equivalent antioxidant capacity coefficients of different classes of antioxidants were determined by applying the developed method. In addition, binary and ternary mixtures of antioxidants were tested to observe the additivity of absorbances of mixture constituents. The method was applied to real samples such as orange juice and green tea. Student t-test, F tests, and the Spearman’s rank correlation coefficient were used for statistical comparisons.

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“…Later on, the electrode was resonicated for another 5 min in a mixture of isopropanol−acetonitrile (1:1, v/v). 35 Voltammetric Method Optimization. The working parameters were comprehensively investigated, such as electrode type, potential range, scan rate, solvent selection, and supporting electrolyte concentration.…”

mentioning

confidence: 99%

Direct Electrochemical Determination of Peroxide-Type Explosives Using Well-Dispersed Multi-Walled Carbon Nanotubes/Polyethyleneimine-Modified Glassy Carbon Electrodes

et al. 2021

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The sensitive and selective determination of peroxide-based explosives (PBEs) in the field/on site is an important analytical challenge. Most methods claiming to detect PBEs are indirect, actually detecting their decomposition product, H2O2. Here, we present an electrochemical sensor for direct detection of organic peroxide explosives, that is, triacetone triperoxide (TATP) and hexamethylenetriperoxide diamine (HMTD), using well-dispersed multiwalled carbon nanotubes/polyethyleneimine (MWCNTs/PEI)-modified glassy carbon (GC) electrode, namely, GC/MWCNTs/PEI electrode. This is the first use of the conductive polyelectrolyte PEI as an electrode modifier for pristine PBE sensing. The potential range, scan rate, solvent selection, and supporting electrolyte concentration were optimized for PBEs. As a distinct advantage over other similar methods, our sensor electrode responded to intact TATP solutions in neutral medium, meaning that TATP did not interact with acids/bases that would transform it into H2O2. Calibration curves were linear in the range of 10–200 mg L–1 for TATP and 25–200 mg L–1 for HMTD. Using differential pulse voltammetry, detection limits of 1.5 mg L–1 TATP and 3.0 mg L–1 HMTD were obtained from direct electrochemical reduction in 80/20% (v/v) H2O–acetone solvent medium. Electroactive camouflage materials such as passenger belongings (e.g., sweetener, detergent, sugar, and paracetamol–caffeine-based analgesic drugs), common ions, and other explosives were shown not to interfere with the proposed method. The nonresponsive behavior of our electrode to H2O2 prevents “false positives” from other peroxide materials of everyday use. This electrochemical sensor could also detect other nitro-explosives at different potentials and was statistically validated against standard GC–MS and spectrophotometric methods.

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Indirect electrochemical determination of antioxidant capacity with hexacyanoferrate(III) reduction using a gold nanoparticle-coatedo-phenylenediamine-aniline copolymer electrode

Cited by 14 publications

References 69 publications

Electrochemical Hybrid Methods and Sensors for Antioxidant/Oxidant Activity Monitoring and Their Use as a Diagnostic Tool of Oxidative Stress: Future Perspectives and Challenges

Electrochemical Hybrid Methods and Sensors for Antioxidant/Oxidant Activity Monitoring and Their Use as a Diagnostic Tool of Oxidative Stress: Future Perspectives and Challenges

Magnetite nanoparticles−based hydroxyl radical scavenging activity assay of antioxidants using N, N-dimethyl-p-phenylenediamine probe

Direct Electrochemical Determination of Peroxide-Type Explosives Using Well-Dispersed Multi-Walled Carbon Nanotubes/Polyethyleneimine-Modified Glassy Carbon Electrodes

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