Investigation of antioxidant and catalytic properties of some biologically active substances by voltammetry

Короткова, Е. И.; Karbainov, Yu. A.; Avramchik, O. A.

doi:10.1007/s00216-002-1687-y

Cited by 64 publications

(48 citation statements)

References 4 publications

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“…The extent of interaction of an antioxidant to quench free radicals may be estimated in terms of changes in oxidation peak current in the presence of antioxidant using cyclic voltammetry [26][27][28].…”

Section: Scavenging Trendsmentioning

confidence: 99%

Electrochemical investigations of antioxidant interactions with radical anion and dianion of 1,3-dinitrobenzene

Arshad

Ahmed

Khan

et al. 2009

Electrochimica Acta

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Section: Scavenging Trendsmentioning

confidence: 99%

Electrochemical investigations of antioxidant interactions with radical anion and dianion of 1,3-dinitrobenzene

Arshad

Ahmed

Khan

et al. 2009

Electrochimica Acta

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“…The constant K ao is defined as the ratio of the current density values, with and without the addition of the substrate to the free radical. To quantify this effect the following equation (Korotkova et al 2003) was employed:…”

Section: Antioxidant Activity Coefficient (K Ao )mentioning

confidence: 99%

Antioxidant activity coefficient, mechanism, and kinetics of different derivatives of flavones and flavanones towards superoxide radical

Ahmed¹,

Shakeel²

2012

Czech J. Food Sci.

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Ahmed S., Shakeel F. (2012). Antioxidant activity coefficient, mechanism, and kinetics of different derivatives of flavones and flavanones towards superoxide radical. Czech J. Food Sci., 30: 153-163.A systematic investigation of the electrochemically generated superoxide radical (O 2•-) has been conducted in the presence of some flavonoids. Cyclic voltammetry was used to generate O 2 •-by reducing the molecular oxygen in DMSO at room temperature. The scavenging of the radical was monitored by the decrease in anodic or/and cathodic currents while linearly increasing the concentration of the flavonoid. The strength of interaction was quantified in terms of the binding constant (K b ) values ranging from 1 × 10 2 and 5 × 10 3 M -1 . The antioxidant activity coefficient (K ao ) was calculated from the linear part of the plot of 'current decrease vs. flavonoid concentration' . Radical scavenging mechanism of the antioxidant was proposed and discussed in terms of the structure activity relationship. Nicholson-Shain method was employed to estimate the bimolecular homogeneous kinetics and on this basis control use of antioxidant is pointed out.

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“…This approach was based on the voltammetry of immobilized particles (VIMP), a methodology which provides the electrochemical response of sparingly soluble solids attached to inert electrodes in contact with suitable electrolytes [23][24][25]. Conventional solutionphase [26][27][28][29][30] and solid-state [31,32] electrochemical techniques have been applied for testing the antioxidative capacity of samples from fruits and vegetables.…”

Section: Introductionmentioning

confidence: 99%

Voltammetric analysis of Pinus needles with physiological, phylogenetic, and forensic applications

et al. 2016

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Polyphenolic compounds are electrochemically active components of vegetal matter which were targeted under simple experimental conditions to produce voltammetric profiles characterizing the metabolite composition. Application to bivariate and multivariate chemometric techniques permits to discriminate the species and age of plant leaves, illustrated here for the case of six Pinus species from two different subgenera. Such responses, associated with the electrochemical oxidation of polyphenolic compounds (quercetin, gallic acid, ellagic acid, among others), define a voltammetric profile which varies systematically with the age of the leaves for the different species. The application of this methodology for phylogenetic studies, plant physiology, forensic science, and chemoecology is discussed. Graphical Abstract Image of Pinus in a typical Mediterranean forest; Courtesy of the Botanic Garden of the University of Valencia.

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Investigation of antioxidant and catalytic properties of some biologically active substances by voltammetry

Cited by 64 publications

References 4 publications

Electrochemical investigations of antioxidant interactions with radical anion and dianion of 1,3-dinitrobenzene

Electrochemical investigations of antioxidant interactions with radical anion and dianion of 1,3-dinitrobenzene

Antioxidant activity coefficient, mechanism, and kinetics of different derivatives of flavones and flavanones towards superoxide radical

Voltammetric analysis of Pinus needles with physiological, phylogenetic, and forensic applications

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