scholarly journals Electrocatalytic determination of captopril using a carbon paste electrode modified with N-(ferrocenyl methylidene) fluorene-2-amine and graphene/ZnO nanocomposite

2019 ◽  
Vol 84 (2) ◽  
pp. 175-185 ◽  
Author(s):  
Mohadeseh Safaei ◽  
Hadi Beitollahi ◽  
Masoud Shishehbore ◽  
Somayeh Tajik ◽  
Rahman Hosseinzadeh
Keyword(s):  
Modified Electrode ◽  
Carbon Paste Electrode ◽  
Electrocatalytic Oxidation ◽  
Differential Pulse ◽  
Diagnostic Techniques ◽  
Carbon Paste ◽  
Pulse Voltammetry ◽  
Electrocatalytic Determination ◽  
Paste Electrode

A carbon paste electrode (CPE) was modified with N-(ferrocenylmethylidene) fluorene-2-amine and graphene/ZnO nanocomposite. The electrooxidation of captopril (CAP) at the surface of the modified electrode was studied using electrochemical approaches. The electrochemical study of the modified electrode, as well as its efficiency for the electrocatalytic oxidation of captopril, is described. The electrode was used to study the electrocatalytic oxidation of captopril, by cyclic voltammetry (CV), chronoamperometry (CHA) and differential pulse voltammetry (DPV) as diagnostic techniques. It has been found that the oxidation of captopril at the surface of modified electrode occurs at a potential of about 340 mV less positive than that of an unmodified CPE. DPV of captopril at the electrochemical sensor exhibited two linear dynamic ranges (0.1?100.0 and 100.0?800.0 ?M) with a detection limit (3?) of 0.05 ?M.

scholarly journals Development of a Carbon Paste Electrode Containing Benzo-15-Crown-5 for Trace Determination of the Uranyl Ion by Using a Voltammetric Technique

2009 ◽  
Vol 92 (1) ◽  
pp. 241-247 ◽  
Author(s):  
Sunil K Agrahari ◽  
Sangita D Kumar ◽  
Ashwini K Srivastava
Keyword(s):  
Detection Limit ◽  
Differential Pulse Voltammetry ◽  
Modified Electrode ◽  
Carbon Paste Electrode ◽  
Electrochemical Impedance ◽  
Differential Pulse ◽  
Carbon Paste ◽  
Pulse Voltammetry ◽  
Paste Electrode

Abstract The interaction of macrocyclic compounds like crown ethers and UO22+ has been studied by electrochemical methods. A modified carbon paste electrode incorporating benzo-15-crown-5 (B15C5) was used to evaluate the electron transfer reaction of UO22+ by cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. Electrochemical impedance studies showed that charge transfer resistance was less for the B15C5-modified electrode than for the plain carbon paste electrode (PCPE). On the basis of these observations, a UO22+-sensitive crown ether chemically modified electrode (CME) for trace analysis was fabricated and investigated in aqueous solutions. It was found that a 5 B15C5CME for UO22+ showed a better voltammetric response than did the PCPE. UO22+ could be quantified at sub-μg/mL levels by differential pulse voltammetry with a detection limit of 0.03 μg/mL. By differential pulse adsorptive stripping voltammetry, UO22+ could be quantified in the working range of 0.002-0.2 μg/mL, with a detection limit of 1.1 μg/L. Simultaneous determination of UO22+, Pb2+, and Cd2+ was possible. The method was successfully applied to the determination of UO22+ in synthetic, as well as real, samples; the results were found to be comparable to those obtained by inductively coupled plasma-atomic emission spectroscopy.

Direct Determination of Boscalid in Grape Samples by Differential Pulse Voltammetry using a Carbon Paste Electrode

2021 ◽  
Author(s):  
Priscila Azevedo Liberato ◽  
Leonardo Luiz Luiz Okumura ◽  
Astréa Filomena de Souza Silva ◽  
Herbert Aleixo ◽  
Júnio Gonçalves Silva ◽  
...  
Keyword(s):  
Carbon Paste Electrode ◽  
Direct Determination ◽  
Differential Pulse ◽  
Grape Seed ◽  
Carbon Paste ◽  
Vitis Labrusca ◽  
Pulse Voltammetry ◽  
Red Grape ◽  
Paste Electrode

A new methodology to determine direct the fungicide Boscalid (BSC) was developed and successfully applied in red grape 100% juice, peel extracts, pulp and purple grape seed (Vitis labrusca L.)...

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.

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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