scholarly journals Determination of Cocaine by Square Wave Voltammetry with Carbon Paste Electrodes

2019 ◽  
Vol 8 (3) ◽  
pp. 149-164 ◽  
Author(s):  
P. H. B. Oliva ◽  
J. M. T. Katayama ◽  
E. N. Oiye ◽  
B. Ferreira ◽  
M. F. Ribeiro ◽  
...  
Keyword(s):  
Square Wave Voltammetry ◽  
Carbon Paste ◽  
Square Wave ◽  
Carbon Paste Electrodes ◽  
Wave Voltammetry

Voltammetric Determination of Fluoren-9-ol and 2-Acetamidofluorene Using Carbon Paste Electrodes

2005 ◽  
Vol 70 (3) ◽  
pp. 292-304 ◽  
Author(s):  
Natalija German ◽  
Saulius Armalis ◽  
Jiří Zima ◽  
Jiří Barek
Keyword(s):  
Differential Pulse Voltammetry ◽  
Square Wave Voltammetry ◽  
Limit Of Detection ◽  
Differential Pulse ◽  
Carbon Paste ◽  
Square Wave ◽  
Carbon Paste Electrodes ◽  
Wave Voltammetry ◽  
Pulse Voltammetry

Square wave voltammetry and differential pulse voltammetry have been used for the determination of 2-acetamidofluorene and fluoren-9-ol using carbon paste electrodes, following the study of the influence of the carbon paste composition on the voltammetric signals of the analytes. The methods are based on the oxidation of the above compounds and they include adsorptive accumulation of the analyte on the surface of the working electrode. The limit of detection was 1 μmol l-1for fluoren-9-ol in a medium of 0.1 M H2SO4, and 40 nmol l-1for 2-acetamidofluorene in Britton-Robinson buffer (pH 7).

Square Wave Voltammetric Determination of Trace Amounts of Europium(III) at Montmorillonite-Modified Carbon Paste Electrodes

2004 ◽  
Vol 69 (8) ◽  
pp. 1590-1599 ◽  
Author(s):  
Xiaobo Ji ◽  
Shengshui hu
Keyword(s):  
Square Wave Voltammetry ◽  
Chemically Modified Electrode ◽  
Carbon Paste ◽  
Square Wave ◽  
Chemically Modified ◽  
Carbon Paste Electrodes ◽  
Wave Voltammetry ◽  
Paste Electrode ◽  
Good Agreement

A carbon paste electrode modified with montmorillonite for the determination of Eu(III) was developed. This chemically modified electrode exhibits strong and stable electroactivity for Eu(III). Square wave voltammetry (SWV) of Eu(III) was evaluated with respect to the quantity of modifier, pH of electrolyte solution, accumulation potential and time. The stripping peak currents increase linearly with concentrations of Eu(III) from 1.0 × 10-7 to 2.0 × 10-5 mol l-1. The detection limit is estimated to be 4 × 10-8 mol l-1 (S/N = 3). The recommended method has been applied to the quantitation of Eu(III) in stream sediment samples; the results obtained by the SWV approach are in good agreement with reference values.

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