Voltammetric determination of epinephrine and xanthine based on sodium dodecyl sulphate assisted tungsten trioxide nanoparticles

Anithaa, A.C.; Asokan, K.; Sekar, C.

doi:10.1016/j.electacta.2017.03.098

Cited by 34 publications

(7 citation statements)

References 34 publications

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“…The CV curve of adrenaline solution (2 × 10 –3 m ) in phosphate buffer (pH = 6.86) at a glassy carbon working electrode is shown in Figure a. It is seen that its oxidation corresponds to a chemically irreversible peak at 0.51 V, and on the reverse scan there is a peak of reduction of adrenalin‐quinone (the product of adrenaline oxidation) . Such easy oxidation of adrenaline reveals its strong antioxidant properties.…”

Section: Resultsmentioning

confidence: 98%

Antioxidant Properties of Adrenaline in the Presence of Ge‐132

et al. 2019

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Using cyclic voltammetry, UV and 1H NMR spectroscopy, we have investigated the effect of 2‐carboxyethylgermanium (Ge‐132), the most common germanium‐containing dietary supplement, on the antioxidant activity of adrenaline in aqueous solutions. The complex formed by adrenaline and Ge‐132 is oxidizable at 400 mV more positive potentials compared to non‐coordinated adrenaline which corresponds to its 9 kcal/mol more difficult oxidation. An equilibrium constant of the complex formation was estimated (1300 m–1). It was shown that at the concentrations <10–3 m the complex Ge‐132‐adrenaline is mostly dissociated to the initial compounds, and the influence of Ge‐132 on the antioxidant properties of adrenaline becomes significant only when the former is in excess. Considering that such concentrations are typical for physiological conditions, this fact can be significant in identifying the mechanism of the biological action of Ge‐132 and its interference with the biological catechols.

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Section: Resultsmentioning

confidence: 98%

Antioxidant Properties of Adrenaline in the Presence of Ge‐132

et al. 2019

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“…The voltammograms of adrenaline show that its anodic peak reaching the maximum at E = 0.51 V (vs. AgCl reference electrode) which correlates to strong antioxidant properties. On the reverse scan, the peak of reduction of adrenaline quinone is observed (Scheme ).…”

Section: Resultsmentioning

confidence: 99%

Germanium Dioxide and the Antioxidant Properties of Catechols

et al. 2019

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Complexes of tetra-and hexa-coordinated germanium Adr Cat 2 Ge (1, Adr Cat = adrenaline catecholate), Ald Cat 2 Ge (2, Ald Cat = 4-formylcatecholate), Ald Cat 3 Ge(Et 3 NH) 2 (3) were synthesized by the reaction of germanium dioxide with adrenaline and 3,4-dihydroxybenzaldehyde in aqueous solution. The structures of the complexes were confirmed by 1 H and 13 C NMR and IR spectroscopy, HRMS, and elemental analysis. Cyclic voltammetry in phosphate buffer solutions (pH = 6.86) has shown the oxidation potentials E p of these complexes to be shifted by ca. 330-360 mV to more positive potentials compared to the parent aromatic diols, which means that their electron-releasing properties were diminished by about 7.6-8.3 kcal mol -1 . A study of the kinetics of the reaction of these complexes with 2,2diphenyl-1-picrylhydrazyl (DPPH) free radical in the presence of [a] N.

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“…Electrochemical sensor developed by Anithaa et al [90] for the simultaneous determination of EP and xanthine is based on the gamma irradiated SDS-WO3 NPs. The fabricated sensor exhibited wide linear range (0.009-1000 μmol L -1 ) with low detection limit (1.8 nmol L -1 ) for EP.…”

Section: 4 Modified Electrode With Nanoparticles and Nanocompositesmentioning

confidence: 99%

Voltammetric and amperometric sensors for determination of epinephrine: A short review (2013-2017)

Beitollahi

Safaei

Tajik

2018

J. Electrochem. Sci. Eng.

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<p><span lang="EN-US">The present review focuses on voltammetric and amperometric methods applied for determination of epinephrine (EP) in last five years (2013-2017). Occurrence, role and biological importance of EP, as well as non-electrochemical methods for its assessment, are firstly reviewed. The electrochemical behavior of EP is then illustrated, followed by a description of the voltammetric and amperometric methods for EP content estimation in various media. Different methods for development of electrochemical sensors are reviewed, starting from unmodified electrodes to different composites incorporating carbon nanotubes, ionic liquids or various mediators. From this perspective, the interaction between functional groups of the sensor material and the analyte molecule is discussed, as it is essential for analytical characteristics obtained. The analytical performances of the voltammetric or amperometric chemical and biochemical sensors (linear range of analytical response, sensitivity, precision, stability, response time, etc.) are highlighted. Numerous applications of EP electrochemical sensors in fields like pharmaceutical or clinical analysis where EP represents a key analyte, are also presented.</span></p>

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Voltammetric determination of epinephrine and xanthine based on sodium dodecyl sulphate assisted tungsten trioxide nanoparticles

Cited by 34 publications

References 34 publications

Antioxidant Properties of Adrenaline in the Presence of Ge‐132

Antioxidant Properties of Adrenaline in the Presence of Ge‐132

Germanium Dioxide and the Antioxidant Properties of Catechols

Voltammetric and amperometric sensors for determination of epinephrine: A short review (2013-2017)

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