Characterization of the surface redox process of adsorbed morin at glassy carbon electrodes

Tesio, Alvaro Yamil; Granero, Adrián Marcelo; Fernández, Héctor; Zón, Marı́a Alicia

doi:10.1016/j.electacta.2010.11.037

Cited by 17 publications

(14 citation statements)

References 40 publications

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“…It is well-known that the reaction at any electrode is dependent on the adsorption of the reactant at the surface of the electrode [10,11]. Generally, the mechanism of photoelectrocatalysis is considered to be based on the activation of a semiconductor by light illumination [12,13].…”

Section: Introductionmentioning

confidence: 99%

Extending the photoelectrocatalytic detection range of KHP by eliminating self-inhibition at TiO2 nanoparticle electrodes

Han

Cheng

Chen

et al. 2015

Journal of Electroanalytical Chemistry

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Section: Introductionmentioning

confidence: 99%

Extending the photoelectrocatalytic detection range of KHP by eliminating self-inhibition at TiO2 nanoparticle electrodes

Han

Cheng

Chen

et al. 2015

Journal of Electroanalytical Chemistry

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“…Literature study shows that not many electrochemical methods are available for the analysis of morin. Electrochemically prepared electrodes for determination of morin include vanadium pentoxide nanoflake film decorated glassy carbon electrode (GCE) [11], polyvinylpyrolidone (PVP) doped carbon paste electrode, Pt electrode [12], bare glassy carbon electrode (GCE) [13] and hanging mercury drop electrode [14], Ir decorated poly(3,4-ethylenedioxythiophene) on carbon fiber paper (Ir-PEDOT/ CFP) [15], 2,5-dimercapto-1,3,4-thiadazole modified carbon fiber paper (p-DMTD/CFP) [16] are also reported. An electrochemical sensing method with molecular imprinting mechanism using Pd nanoparticles-porous graphene carbon nanotubes (CNTs)/GCE has also been listed for quercetin [17].…”

Section: Introductionmentioning

confidence: 99%

β-Cyclodextrin-PANI decorated pencil graphite electrode for the electrochemical sensing of morin in almonds and mulberry leaves

et al. 2020

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Morin (3,2,4,5,7-pentahydroxyflavone) is one of the natural flavonoids which is present in a variety of fruits and herbs. β-cyclodextrin (β-CD) and polyaniline (PANI) decorated Pencil graphite electrode (PGE) has been successfully used as a sensitive and conducting electrode for the determination of morin. The hydroxyl groups of β-CD attract the analyte towards the modified electrode through hydrogen bonding. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques were employed to study the electrochemical properties of the modified electrodes. The enhanced surface roughness of β-CD-PANI/PGE has resulted in the increase of electrocatalytic activity of electrode towards the analyte. Opitical profilometric studies were performed to evaluate the surface roughness of electrodes and differential pulse votammetry (DPV) was used for the quantitative analysis of morin. Scanning electron microscopy (SEM), Raman spectroscopy and Fourier transform infrared (FTIR) spectroscopy were carried out to know the physicochemical characteristics of the modified electrodes. The experimental conditions such as scan rate, pH and concentration were optimized. The electrochemical process was found to be adsorption controlled and irreversible from scan rate studies. Under optimal conditions, the linear dynamic range for the quantification of morin was found to be 1.17-32 nM. The low detection limit (0.38 nM) indicates ultrasensitivity of the proposed method. The suggested method has been effectively employed for the determination of morin in almonds and mulberry leaves.

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“…Tesio et al studied the thermodynamic and kinetics of the adsorption of morin on glassy carbon (GC) electrodes by both cyclic and square wave voltammetries [20]. The Frumkin adsorption isotherm was the best to describe the specific interaction of morin with GC electrodes.…”

Section: Introductionmentioning

confidence: 99%

Online Coupling of Lab-on-Valve Format to Amperometry Based on Polyvinylpyrrolidone-Doped Carbon Paste Electrode and Its Application to the Analysis of Morin

Wang

Yao

Tang

et al. 2012

Journal of Analytical Methods in Chemistry

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The potential capabilities and analytical performance of lab-on-valve (LOV) manifold as a front end to amperometry have been explored for the on-line determination of morin. Meanwhile, the electrochemical behaviors of morin were investigated based on polyvinylpyrrolidone- (PVP-) doped carbon paste electrode (CPE), which found that PVP can significantly improve its oxidation peak current. The excellent amperometric current response was achieved when the potential difference (ΔE) of 0.6 V was implemented in pH 6.5 phosphate buffer solution (PBS) that served as the supporting electrolyte. A well-defined oxidation peak has been obtained in studies using PVP as a modifier of CPE based on the oxidation of morin. The present work introduces the LOV technique as a useful tool for amperometric measurement, documents advantages of using programmable flow, and outlines means for miniaturization of assays on the basis of PVP modified CPE. The proposed method was applied successfully to the determination of morin in real samples, and the spiked recoveries were satisfactory.

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Characterization of the surface redox process of adsorbed morin at glassy carbon electrodes

Cited by 17 publications

References 40 publications

Extending the photoelectrocatalytic detection range of KHP by eliminating self-inhibition at TiO2 nanoparticle electrodes

Extending the photoelectrocatalytic detection range of KHP by eliminating self-inhibition at TiO2 nanoparticle electrodes

β-Cyclodextrin-PANI decorated pencil graphite electrode for the electrochemical sensing of morin in almonds and mulberry leaves

Online Coupling of Lab-on-Valve Format to Amperometry Based on Polyvinylpyrrolidone-Doped Carbon Paste Electrode and Its Application to the Analysis of Morin

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