The classical 1D continuum model of oxygen exchange in a porous mixed conductor (bulk path) is presented terms Linear Sweep Voltammetry (LSV) and Cyclic (CV). We show that, from formal point view, it corresponds to an insertion, diffusion chemical reaction mechanism. Some general rules for LSV/CV curves are established. Using dimensionless description, we evidence eight different limiting behav...

In this paper malachite green (MG) was used as a bioprobe to determine heparin concentration by linear sweep voltammetry on the dropping mercury working electrode (DME). In Britton-Robinson (B-R) buffer solution of pH 1.5, MG had a well-defined second order derivative linear sweep voltammetric reductive peak at –0.618 V (vs. SCE). After the addition of heparin into the MG solution, the reductiv...

A new sensitive electrochemical sensor for the detection of copper ions based on the copper ion assisted etching of Au@Ag nanoparticles was developed in this work. Since copper ions could greatly catalyze the etching process of the silver shell of Au@Ag nanoparticles in the presence of thiosulfate solutions, leading to an obvious decrease of the linear sweep voltammetry (LSV) signals of silver,...

A poly(methyl red) film-modified glassy carbon electrode (PMRE) was fabricated for determination of norfloxacin (NFX). The electrochemical behavior of NFX was investigated and a well-defined oxidation peak with high sensitivity was observed at the film electrode. PMRE greatly enhanced the oxidation peak current of NFX owing to the extraordinary properties of poly(methyl red) film. Based on this...

A multi-wall carbon nanotubes (MWCNTs) composite with Nafion was modified on a glass carbon electrode. The modified electrode was then used as a voltammetric sensor in detecting 2,4,6-triaminopyrimidine (TAP). The surface morphology of the Nafion/MWCNTs composite film was characterized by atomic force microscopy (AFM), and the electrochemical behavior of TAP at this sensor was investigated in d...

By using linear sweep voltammetry and chronoamperometry at a rotating disc electrode it was found that sodium dithionite can be oxidised at several electrode materials. At platinum, palladium, glassy carbon and gold an oxidation reaction was observed that showed promising characteristics for analytical purposes and sensor development. The limiting current signal at a potential of +0.3 V vs. SSE...

The behavior of chlordiazepoxide has been studied using dc-polarography at dropping mercury electrode (DME) and cyclic voltammetry at glassy carbon electrode (GCE). In Britton-Robinson buffers, the drug developed three reduction irreversible waves in acidic solutions, and only two waves in alkaline media. The adsorptive stripping voltammetric behavior of chlorodiazepoxide was studied at GCE, an...

A sensitive electrochemical molecularly-imprinted sensor was developed for the detection of aflatoxin B1 (AFB1), by electropolymerization of p-aminothiophenol-functionalized gold nanoparticles in the presence of AFB1 as a template molecule. The extraction of the template leads to the formation of cavities that are able to specifically recognize and bind AFB1 through π-π interactions between AFB...

A novel MnO2 nanorods modified screen-printed electrode was fabricated and used as a voltammetric sensor for Sudan determination. were characterized using Field emission-scanning electron microscopy (FE-SEM). Electrochemical measurements performed cyclic voltammetry (CV), linear sweep (LSV), differential pulse (DPV), chronoammperometry (CA). The on the surface act an excellent catalyst oxidatio...