Simultaneous determination of vitamins C, B6 and PP in pharmaceutics using differential pulse voltammetry with a glassy carbon electrode and multivariate calibration tools

2005 ◽  
Vol 38 (1) ◽  
pp. 94-99 ◽  
Author(s):  
Rosângela C. Barthus ◽  
Luiz H. Mazo ◽  
Ronei J. Poppi
Keyword(s):  
Differential Pulse Voltammetry ◽  
Simultaneous Determination ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Multivariate Calibration ◽  
Differential Pulse ◽  
Carbon Electrode ◽  
Pulse Voltammetry

Electrochemical speciation analysis for simultaneous determination of Cr(iii) and Cr(vi) using an activated glassy carbon electrode

The Analyst ◽  
2016 ◽  
Vol 141 (19) ◽  
pp. 5577-5585 ◽  
Author(s):  
Lukas Richtera ◽  
Hoai Viet Nguyen ◽  
David Hynek ◽  
Jiri Kudr ◽  
Vojtech Adam
Keyword(s):  
Differential Pulse Voltammetry ◽  
Simultaneous Determination ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Speciation Analysis ◽  
Differential Pulse ◽  
Carbon Electrode ◽  
Pulse Voltammetry

In this study, the enhancement of electrochemical signals of Cr(iii) and Cr(vi) by using an activated glassy carbon electrode (GCE) measured by differential pulse voltammetry (DPV) is demonstrated.

Determination of Drimarene Blue X-BLN at a glassy carbon electrode by differential pulse voltammetry

2011 ◽  
Vol 76 (12) ◽  
pp. 1765-1773 ◽  
Author(s):  
Abd-Elgawad M. Radi ◽  
Mohammed R. Mostafa ◽  
Reda M. Elshafey ◽  
Talaat A. Hegazy
Keyword(s):  
Differential Pulse Voltammetry ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Supporting Electrolyte ◽  
Differential Pulse ◽  
Redox Couple ◽  
Carbon Electrode ◽  
Validation Parameters ◽  
Pulse Voltammetry

The electrochemical oxidation behaviour of Drimarene Blue X-BLN (DB) has been investigated in phosphate buffers (pH 2.54–10.18) by cyclic and differential pulse voltammetry (DPV) at a glassy carbon electrode (GCE). The oxidation of DB dye generated well-defined pH-dependent two pairs of quasi-reversible anodic-cathodic peak couples. DB exhibited the second redox couple over the entire pH range, while the first redox couple disappeared for pH ≥ 6.70. The redox processes were adsorption-controlled. An electroanalytical method was developed for the determination of DB in phosphate buffer solution (pH 2.85) as supporting electrolyte using DPV. The anodic current heights varied linearly with DB concentrations in the ranges 2 × 10–6–3 × 10–5 and 6 × 10–6–3 × 10–5 mol l–1 with limits of detection (LOD) of 8.7 × 10–7 and 5.7 × 10–7 mol l–1 and limits of quantification (LOQ) of 2.9 × 10–6 and 1.9 × 10–6 mol l–1 for the first and second anodic peaks, respectively. Validation parameters, such as accuracy, precision and recovery were evaluated. The proposed method was successfully applied to the determination of DB in tap water and the analytical results compared well with those obtained by the spectrophotometric method.

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