Square wave voltammetry at the dropping mercury electrode: experimental

1977 ◽  
Vol 49 (13) ◽  
pp. 1904-1908 ◽  
Author(s):  
John A. Turner ◽  
J. H. Christie ◽  
M. Vukovic ◽  
R. A. Osteryoung
Keyword(s):  
Square Wave Voltammetry ◽  
Mercury Electrode ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Dropping Mercury Electrode

Square wave voltammetry at the dropping mercury electrode: theory

1977 ◽  
Vol 49 (13) ◽  
pp. 1899-1903 ◽  
Author(s):  
J. H. Christie ◽  
John A. Turner ◽  
R. A. Osteryoung
Keyword(s):  
Square Wave Voltammetry ◽  
Mercury Electrode ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Dropping Mercury Electrode

Square Wave Voltammetry at the Dropping Mercury Electrode: Theoretical

1977 ◽  
Author(s):  
J. H. Christie ◽  
John A. Turner ◽  
R. A. Osteryoung
Keyword(s):  
Square Wave Voltammetry ◽  
Mercury Electrode ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Dropping Mercury Electrode

scholarly journals Quantitative determination of glycyrrhizinic acid by square-wave voltammetry and high-pressure liquid chromatography

2003 ◽  
Vol 48 ◽  
pp. 3-8
Author(s):  
Aneta Dimitrovska ◽  
Valentin Mircevski ◽  
Svetlana Kulevanova
Keyword(s):  
High Pressure ◽  
Quantitative Determination ◽  
Electrode Surface ◽  
Square Wave Voltammetry ◽  
Mercury Electrode ◽  
Voltammetric Method ◽  
Square Wave ◽  
Glycyrrhizinic Acid ◽  
Wave Voltammetry

Novel adsorptive stripping square-wave voltammetric method as well as a new high-pressure liquid chromatographic method for direct determination of glycyrrhizinic acid in dosage pharmaceutical preparation, used against virus infections, have been developed. Glycyrrhizinic acid is an electrochemically active compound, which undergoes irreversible reduction on a mercury electrode surface in an aqueous medium. Its redox properties were studied thoroughly by means of square-wave voltammetry, as one of the most advanced electroanalytical technique. The voltammetric response depends mainly on the pH of the medium, composition of the supporting electrolyte, as well as the parameters of the excitement signal. It was also observed that the voltammetric properties strongly depend on the accumulation time and potential, revealing significant adsorption of glycyrrhizinic acid onto the mercury electrode surface. Upon this feature, an adsorptive stripping voltammetric method for quantitative determination of glycyrrhizinic acid was developed. A simple, sensitive and precise reversed phase HPLC method with photodiode array UV detection has also been developed, mainly for comparison and conformation of the results obtained with the voltammetric method.

Redox kinetic measurements of glutathione at the mercury electrode by means of square-wave voltammetry. The role of copper, cadmium and zinc ions

2004 ◽  
Vol 65 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Mitko Mladenov ◽  
Valentin Mirčeski ◽  
Icko Gjorgoski ◽  
Blagoja Jordanoski
Keyword(s):  
Square Wave Voltammetry ◽  
Mercury Electrode ◽  
Zinc Ions ◽  
Kinetic Measurements ◽  
Square Wave ◽  
Wave Voltammetry

Electrochemical studies of ganciclovir as the adsorbed catalyst on mercury electrode

2009 ◽  
Vol 74 (10) ◽  
pp. 1455-1466 ◽  
Author(s):  
Sławomira Skrzypek ◽  
Agnieszka Nosal-Wiercińska ◽  
Witold Ciesielski
Keyword(s):  
Square Wave Voltammetry ◽  
Mercury Electrode ◽  
Antiviral Drug ◽  
Linear Sweep Voltammetry ◽  
Protonated Form ◽  
Catalytic Method ◽  
Square Wave ◽  
Mercury Surface ◽  
Capacity Curves ◽  
Wave Voltammetry

Although ganciclovir (gan) as a purine analogue is a compound of biological interest (antiviral drug), it has been rarely electrochemically studied. In this paper surface catalytic electrode mechanism based on the hydrogen evolution reaction is analyzed under conditions of square-wave voltammetry and differential capacity curves of double layer measurements. The electrode mechanism is assumed to involve a preceding chemical reaction in which the adsorbed catalyst (ganads) is protonated at the electrode surface, i.e., ganads + H+aq → ganH+ads. The protonated form of the catalyst (ganH+ads) is irreversibly reduced at potential about –1.35 V vs Ag|AgCl, yielding the initial form of the catalyst and atomic hydrogen, i.e., ganH+ads + e → ganads + Haq. Changes of zero charge potential and surface tension point to the adsorption of ganciclovir molecule directed with guanine group to the mercury surface and suggests that ganciclovir molecules are not placed flat on the mercury surface. The effect of adsorption on mercury electrode was studied in detail in respect to analytical usefulness of the obtained results. A new catalytic method for voltammetric determination of ganciclovir was developed. The detection and quantification limits were 1.3 × 10–7 and 4.3 × 10–7 mol l–1 for square-wave voltammetry, and 1.4 × 10–7 and 4.7 × 10–7 mol l–1 for linear-sweep voltammetry.

An Experimental Investigation of Quasireversible Maximum of Azobenzene on Mercury Electrode by Fourier Transformed Square-Wave Voltammetry

2009 ◽  
Vol 21 (6) ◽  
pp. 755-761 ◽  
Author(s):  
Lishi Wang ◽  
Huilian Chen ◽  
Xinjian Huang ◽  
Junmin Nan
Keyword(s):  
Experimental Investigation ◽  
Square Wave Voltammetry ◽  
Mercury Electrode ◽  
Square Wave ◽  
Wave Voltammetry

Studying electrode mechanism and analytical determination of cocaine and its metabolites at the mercury electrode using square-wave voltammetry

2004 ◽  
Vol 512 (1) ◽  
pp. 49-56 ◽  
Author(s):  
Valentina Pavlova ◽  
Valentin Mirčeski ◽  
Šebojka Komorsky-Lovrić ◽  
Simka Petrovska-Jovanović ◽  
Blagoj Mitrevski
Keyword(s):  
Square Wave Voltammetry ◽  
Mercury Electrode ◽  
Analytical Determination ◽  
Square Wave ◽  
Wave Voltammetry

Voltammetry of resazurin at a mercury electrode

2010 ◽  
Vol 64 (3) ◽  
Author(s):  
Semiha Çakir ◽  
Emine Arslan
Keyword(s):  
Square Wave Voltammetry ◽  
Mercury Electrode ◽  
Stripping Voltammetry ◽  
Cathodic Reduction ◽  
Reduction Peak ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Reduction Mechanisms ◽  
Electrochemical Parameters ◽  
Catalytic Hydrogen

AbstractElectrochemical behavior of resazurin on HMDE in Britton-Robinson (B-R) buffers (pH 2.0–10.0) was studied using the square-wave voltammetry (SWV), square-wave adsorptive stripping voltammetry (SWAdSV), and cyclic voltammetry (CV) techniques. The voltammogram of resazurin in B-R buffer at pH < 4.0 exhibited two cathodic reduction peaks. The voltammetric peaks were obtained at −0.144 V (reversible) and −1.250 V (irreversible) at pH 3.2, and correspond to the reduction of resorufin to dihydroresorufin and to the catalytic hydrogen wave, respectively. At pH > 4.0, a new irreversible cathodic reduction peak, assigned to the protonation of N-oxide on the phenoxazin ring, was observed. Electrochemical parameters (I p/E p, I p/v, I p/pH, I p/t acc) of the compound were determined. From the voltammetric data, electrochemical reduction mechanisms for all peaks have been suggested. Maximum peak current for the reversible peak was obtained at pH 4.1. A linear relationship between the current and concentration was determined, and also the lowest detection limit was found as 3.25 × 10−8 mol L−1 and 1.98 × 10−10 mol L−1 for SWV and SWAdSV, respectively.

SIMULTANEOUS ARSENIC (III) AND LEAD (II) DETECTION FROM AQUEOUS SOLUTION BY ANODIC STRIPPING SQUARE-WAVE VOLTAMMETRY

2014 ◽  
Vol 13 (9) ◽  
pp. 2317-2323 ◽  
Author(s):  
Florica Manea ◽  
Anamaria Baciu ◽  
Aniela Pop ◽  
Joop Schoonman
Keyword(s):  
Aqueous Solution ◽  
Square Wave Voltammetry ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Anodic Stripping
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