Erratum: “Effect of Ohmic, Mass‐Transfer, and Kinetic Resistance on Linear‐Sweep Voltammetry in a Cylindrical‐Pore Electrodes” [J. Electrochem. Soc., 138, 2514 (1991)]

The electrooxidation of luminol in alkaline solutions in the presence of cetyltrimethylammonium bromide (I) was studied by linear sweep voltammetry on fixed and vibrating platinum electrodes. The presence of I in low concentrations (below the critical micellar concentration) brings about aggregation of the luminol, which is manifested by an increase in the anodic peak height and its shift towards lower potentials. In micellar solutions the peak height decreases owing to the slower diffusion of the bulkier micelles, the shift to lower potentials being preserved. The light-voltage curves correspond with the voltammetric curves, exhibiting identical shifts of the peak potentials in dependence on the concentration of the surfactant.

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Analysis of the diffusion layer thickness, equivalent circuit and conductance behaviour for reversible electron transfer processes in linear sweep voltammetry

Electrochimica Acta ◽

10.1016/j.electacta.2003.05.003 ◽

2004 ◽

Vol 49 (3) ◽

pp. 445-453 ◽

Cited By ~ 14

Author(s):

M. Arun Prasad ◽

M.V. Sangaranarayanan

Keyword(s):

Electron Transfer ◽

Equivalent Circuit ◽

Layer Thickness ◽

Diffusion Layer ◽

Linear Sweep Voltammetry ◽

Linear Sweep ◽

Diffusion Layer Thickness ◽

Transfer Processes ◽

Reversible Electron Transfer ◽

Electron Transfer Processes

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Electrochemical Approaches for Rapid Characterization of Oxidizable Compounds in Different Oak Alternatives

Beverages ◽

10.3390/beverages7010001 ◽

2020 ◽

Vol 7 (1) ◽

pp. 1

Author(s):

Jéremie Wirth ◽

Davide Slaghenaufi ◽

Stéphane Vidal ◽

Maurizio Ugliano

Keyword(s):

Linear Sweep Voltammetry ◽

Wine Industry ◽

Wine Aroma ◽

Total Current ◽

Strong Correlations ◽

Tannin Content ◽

Linear Sweep ◽

Antioxidant Characteristics ◽

Rapid Characterization

Oak alternatives (OAs) such as chips, granulates or staves, are becoming increasingly used in the wine industry. Although they are mostly considered for their contribution to wine aroma, they are also a source of phenolic compounds to be released in the wine, in particular ellagitannins contributing to wine mouthfeel and antioxidant characteristics. In the present study, we explore the potential for a rapid analytical method based on linear sweep voltammetry (LSV) combined with disposable sensors to provide a rapid measure of the oxidizable compounds present in different OAs, as well as their characterization. Strong correlations were found between the tannin content of different OAs and the total current measures during LSV analysis, allowing a rapid quantification of the oxidizable compounds present, mostly ellagitannin. Application of derivatization to raw voltammograms allowed extraction of a number of features that can be used for classification purposes, in particular with respect to OAs types (chips or staves) and degree of toasting.

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The cathodic reduction of PbO in the passive layer on lead in aqueous sulphuric acid

Canadian Journal of Chemistry ◽

10.1139/v84-100 ◽

1984 ◽

Vol 62 (3) ◽

pp. 596-600 ◽

Cited By ~ 17

Author(s):

R. G. Barradas ◽

D. S. Nadezhdin

Keyword(s):

Experimental Data ◽

Three Dimensional ◽

Reference Electrode ◽

Linear Sweep Voltammetry ◽

Passive Layer ◽

Cathodic Reduction ◽

Linear Sweep ◽

Current Time ◽

Lead Monoxide ◽

Two Peaks

The cathodic reduction of the lead monoxide layer formed on lead in 30% aqueous H2SO4 under anodic oxidation at 0.6 V (vs. Hg/HgSO4 reference electrode) was investigated by linear sweep voltammetry, potential step and admittance measurements. The experimental data were analyzed respectively in terms of thin-layer electrochemistry, electrocrystallisation, and changes of resistance of the PbO layer under reduction. The results seem to be best interpreted from the theory of three-dimensional electrocrystallisation as PbO is reduced to Pb. At sub-zero temperatures the PbO peak observed on our voltammograms and potentiostatic current time transients reveals the splitting of the curves into two peaks, which may be a result of reduction of the same material but of different phases, namely, orthorhombic and tetragonal PbO.

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