scholarly journals Electrochemical Study of the Antineoplastic Agent Etoposide at Carbon Paste Electrode and Its Determination in Spiked Human Serum by Differential Pulse Voltammetry

2007 ◽  
Vol 55 (9) ◽  
pp. 1379-1382 ◽  
Author(s):  
Abd-Elgawad Radi ◽  
Nadia Abd-Elghany ◽  
Tarek Wahdan
Keyword(s):  
Human Serum ◽  
Differential Pulse Voltammetry ◽  
Carbon Paste Electrode ◽  
Antineoplastic Agent ◽  
Differential Pulse ◽  
Electrochemical Study ◽  
Carbon Paste ◽  
Pulse Voltammetry ◽  
Paste Electrode

scholarly journals SENSITIVE MULTIRESIDUE QUANTIFICATION OF PROCYMIDONE AND TEBUTHIURON ON CARBON PASTE ELECTRODE BY DIFFERENTIAL-PULSE VOLTAMMETRY

2016 ◽  
Vol 2 (3) ◽  
pp. 171-189
Author(s):  
Meilene Ribeiro Fidélis ◽  
Leonardo Luiz Okumura ◽  
Ástrea Filomena de Souza Silva ◽  
Alexandre Gurgel ◽  
Adelir Aparecida Saczk
Keyword(s):  
Differential Pulse Voltammetry ◽  
Carbon Paste Electrode ◽  
Supporting Electrolyte ◽  
Differential Pulse ◽  
Carbon Paste ◽  
Intermediate Precision ◽  
Water Matrix ◽  
Quantitative Analyses ◽  
Pulse Voltammetry ◽  
Paste Electrode

  Qualitative electrochemical characterization of procymidone (PRO) and tebuthiuron (TBH) was carried out by cyclic voltammetry using a carbon paste electrode. The studies suggest that analyte mass transfer is controlled by diffusion, and that oxidation of PRO and TBH occurs by means of irreversible electronic transfer of one electron. Oxidation of PRO and TBH occurs close to +0.820 V and +1.075 V (vs. Ag|AgCl, KCl 3.0 mol L-1), respectively, in a 0.1-M KOH solution as supporting electrolyte. Quantitative analyses were carried out by differential-pulse voltammetry, a technique which is more sensitive and selective. Detection and quantification limits were determined for PRO and TBH in the absence of matrix, in a potable-water matrix, and in a nonpotable-water matrix, for which the ranges of reproducibility, intermediate precision and recovery rates were (1.01 and 4.20 %), (4.08 and 9.56 %), and (90.6 and 115 %) for PRO, and (1.59 and 3.92 %), (4.84 and 7.46 %), and (91.3 and 119 %), for TBH, respectively. The results indicate that the new method is selective, simple and cheap to simultaneously quantify PRO and TBH in water samples.

scholarly journals Simultaneous Quantification of Four Principal NSAIDs through Voltammetry and Artificial Neural Networks Using a Modified Carbon Paste Electrode in Pharmaceutical Samples

2021 ◽  
Vol 5 (1) ◽  
pp. 3
Author(s):  
Guadalupe Yoselin Aguilar-Lira ◽  
Prisciliano Hernandez ◽  
Giaan Arturo Álvarez-Romero ◽  
Juan Manuel Gutiérrez
Keyword(s):  
Differential Pulse Voltammetry ◽  
Carbon Paste Electrode ◽  
Differential Pulse ◽  
Carbon Paste ◽  
Pharmaceutical Samples ◽  
Simultaneous Quantification ◽  
Drug Concentrations ◽  
Pulse Voltammetry ◽  
Artificial Neural ◽  
Paste Electrode

This work describes the development of a novel and low-cost methodology for the simultaneous quantification of four main nonsteroidal anti-inflammatory drugs (NSAIDs) in pharmaceutical samples using differential pulse voltammetry coupled with an artificial neural network model (ANN). The working electrode used as a detector was a carbon paste electrode (CPE) modified with multi-wall carbon nanotubes (MWCNT-CPE). The specific voltammetric determination of the drugs was performed by cyclic voltammetry (CV). Some characteristic anodic peaks were found at potentials of 0.446, 0.629, 0.883 V related to paracetamol, diclofenac, and aspirin. For naproxen, two anodic peaks were found at 0.888 and 1.14 V and for ibuprofen, an anodic peak was not observed at an optimum pH of 10 in 0.1 mol L−1 Britton–Robinson buffer. Since these drug’s oxidation process turned out to be irreversible and diffusion-controlled, drug quantification was carried out by differential pulse voltammetry (DPV). The Box Behnken design technique’s optimal parameters were: step potential of 5.85 mV, the amplitude of 50 mV, period of 750 ms, and a pulse width of 50 ms. A data pretreatment was carried out using the Discrete Wavelet Transform using the db4 wavelet at the fourth decomposition level applied to the voltammetric records obtained. An ANN was built to interpret the obtained approximation coefficients of voltammograms generated at different drug concentrations to calibrate the system. The ANN model’s architecture is based on a Multilayer Perceptron Network (MLP) that employed a Bayesian regularization training algorithm. The trained MLP achieves significant R values for the test data to simultaneous quantification of the four drugs in the presence of aspirin.

DIFFERENTIAL PULSE VOLTAMMETRY FOR DETERMINATION OF PARACETAMOL AT A PUMICE MIXED CARBON PASTE ELECTRODE

2001 ◽  
Vol 34 (15) ◽  
pp. 2747-2759 ◽  
Author(s):  
Chengyin Wang ◽  
Xiaoya Hu ◽  
Zongzhou Leng ◽  
Gongjun Yang ◽  
Gendi Jin
Keyword(s):  
Differential Pulse Voltammetry ◽  
Carbon Paste Electrode ◽  
Differential Pulse ◽  
Carbon Paste ◽  
Pulse Voltammetry ◽  
Paste Electrode

A graphene/ionic liquid modified selenium-doped carbon paste electrode for determination of copper and antimony

2016 ◽  
Vol 8 (5) ◽  
pp. 1120-1126 ◽  
Author(s):  
Rong Liu ◽  
Cunxi Lei ◽  
Tongsheng Zhong ◽  
Liping Long ◽  
Zhaoyang Wu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Differential Pulse Voltammetry ◽  
Carbon Paste Electrode ◽  
Differential Pulse ◽  
Carbon Paste ◽  
Pulse Voltammetry ◽  
Paste Electrode ◽  
Determination Of Copper

A graphene (GN) and ionic liquid (IL) modified selenium-doped carbon paste electrode (GN/IL/Se/CPE) was established to simultaneously determine trace Cu(ii) and Sb(iii) by differential pulse voltammetry (DPV).

scholarly journals Electrochemical Behavior and Voltammetric Determination of a Manganese(II) Complex at a Carbon Paste Electrode

2016 ◽  
Vol 11 ◽  
pp. ACI.S32150 ◽  
Author(s):  
Sophia Karastogianni ◽  
Stella Girousi
Keyword(s):  
Carboxylic Acid ◽  
Differential Pulse Voltammetry ◽  
Carbon Paste Electrode ◽  
Electrochemical Behavior ◽  
Differential Pulse ◽  
Carbon Paste ◽  
Oxidation Reduction ◽  
Pulse Voltammetry ◽  
Paste Electrode

Investigation of the electrochemical behavior using cyclic voltammetry and detection of [Mn2+(thiophenyl-2-carboxylic acid)2 (triethanolamine)] with adsorptive stripping differential pulse voltammetry. The electrochemical behavior of a manganese(II) complex [Mn2+(thiophenyl-2-carboxylic acid)2(triethanolamine)] (A) was investigated using cyclic and differential pulse voltammetry in an acetate buffer of pH 4.6 at a carbon paste electrode. Further, an oxidation-reduction mechanism was proposed. Meanwhile, an adsorptive stripping differential pulse voltammetric method was developed for the determination of manganese(II) complex.

scholarly journals Differential Pulse Voltammetry Technique Using Ferrocene-Modified Carbon Paste Electrodes for Determination of Pb(II) In Kepok Banana

2021 ◽  
Vol 6 (2) ◽  
pp. 185-191
Author(s):  
Irdhawati Irdhawati ◽  
Feby Silvia ◽  
Emmy Sahara ◽  
Nur Alisyah Gani
Keyword(s):  
Differential Pulse Voltammetry ◽  
Carbon Paste Electrode ◽  
Differential Pulse ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Limit Values ◽  
Validation Parameters ◽  
Scan Rate ◽  
Pulse Voltammetry ◽  
Paste Electrode

The voltammetry method is a field of electrochemistry that measures electric current at a certain potential, which can be used to determine the concentration of inorganic and organic compounds that can be oxidized or reduced. In this research, the differential pulse voltammetry (DPV) technique has been used to determine the content of Pb(II). The carbon paste electrode (CPE) and ferrocene-modified carbon paste electrode (CPE-Fc) were used as working electrodes. This study aims to improve the sensitivity of Pb(II) measurement. Two parameters were optimized were ferrocene composition and scan rate. The validation parameters involved the linear concentration range, detection limit, quantization limit, precision and accuracy. The optimum ferrocene composition was found at 6%, and scan rate was 15 mV/s using CPE, increase to 20 mV/s using CPE-Fc. The validation results showed  the linearity using CPE-Fc  wider than CPE at the peak potential of 0.515 V. The detection and quantization limit values using CPE were 0.1551 µg/L and 0.1556 µg/L, and down to 0.1089 µg/L and 0.1090 µg/L using CPE-Fc. The precision determination for both of CPE and CPE-Fc had good results, indicated by the Horwitz ratio less than two. Percentage of recovery using CPE-Fc of 85.59  8.18%. CPE-Fc at the optimum measurement conditions was used to determine the levels of Pb(II) in kepok banana, and the result was obtained 4.4306  0.0009 mg/kg. The level of Pb content was found to exceed the established threshold based on Standard National Indonesia (ISN) No. 7387:2009  which is 0.5 mg/kg.

Determination of flunitrazepam by differential-pulse voltammetry using a bentonite-modified carbon paste electrode

The Analyst ◽  
1988 ◽  
Vol 113 (11) ◽  
pp. 1719-1722 ◽  
Author(s):  
Lucas Hernández ◽  
Pedro Hernández ◽  
Manuel H. Blanco ◽  
Encarnacion Lorenzo ◽  
Engracia Alda
Keyword(s):  
Differential Pulse Voltammetry ◽  
Carbon Paste Electrode ◽  
Differential Pulse ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Pulse Voltammetry ◽  
Paste Electrode
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