Differential pulse voltammetry determination of ascorbic acid with ferrocene-l-cysteine self-assembled supramolecular film modified electrode

2004 ◽  
Vol 97 (2-3) ◽  
pp. 373-378 ◽  
Author(s):  
Shengfu Wang ◽  
Dan Du
Keyword(s):  
Ascorbic Acid ◽  
Differential Pulse Voltammetry ◽  
Modified Electrode ◽  
Differential Pulse ◽  
Pulse Voltammetry ◽  
Self Assembled

NiFe2O4nanoparticles decorated with MWCNTs as a selective and sensitive electrochemical sensor for the determination of epinephrine using differential pulse voltammetry

2014 ◽  
Vol 6 (17) ◽  
pp. 6885-6892 ◽  
Author(s):  
Ali A. Ensafi ◽  
F. Saeid ◽  
B. Rezaei ◽  
Ali R. Allafchian
Keyword(s):  
Electrochemical Sensor ◽  
Differential Pulse Voltammetry ◽  
Modified Electrode ◽  
Electrochemical Method ◽  
Differential Pulse ◽  
Synergic Effect ◽  
Pulse Voltammetry

A new electrochemical method was developed for epinephrine detection based on NiFe2O4–MWCNT-modified electrode. The nanocomposite has a synergic effect on the oxidation of epinephrine.

scholarly journals Electrochemical and analytical performance of boron-doped diamond electrode for determination of ascorbic acid

2017 ◽  
Vol 10 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Ivana Sálusová ◽  
Kristína Cinková ◽  
Barbora Brtková ◽  
Marian Vojs ◽  
Marián Marton ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Differential Pulse Voltammetry ◽  
Differential Pulse ◽  
Analytical Performance ◽  
Current Response ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Relative Standard ◽  
Pulse Voltammetry

Abstract The electrochemical behavior and determination of ascorbic acid (AA) was investigated at a bare boron-doped diamond (BDD) electrode using cyclic and differential pulse voltammetry. The influence of pH of supporting electrolyte and scan rate on the current response of analyte was examined to select the suitable experimental conditions. It was found that AA provided one well-shaped irreversible and diffusioncontrolled oxidation peak at +0.87 V vs. Ag/AgCl in Britton-Robinson buffer pH 4.0. Applying differential pulse voltammetry, the peak current of AA was linearly proportional to its concentration from 5 × 10-6 to 2 × 10-4 mol L-1 (R2 = 0.999), with the limit of detection of 1.1 × 10-6 mol L-1 and the good repeatability (relative standard deviation of 2.3 %). The developed electroanalytical protocol was successfully applied to determine the content of AA in commercial pharmaceutical preparations, based on the standard additions method, with the obtained recovery of 122 %. The accomplished analytical performance indicates that BDD electrodes are promising electrochemical sensors for pharmaceutical analysis.

Sign in / Sign up

Export Citation Format

Share Document