نتایج جستجو برای: differential pulse voltammetry dpv

تعداد نتایج: 377940  

2007
Z. EL - SHERIF A. WASSEL

The electrochemical oxidation of labetalol was investigated by cyclic, linear sweep and differential pulse voltammetry at carbon paste electrode in Britton—Robinson buffers over the pH range 2.0—10.0. For analytical purposes, a well-defined adsorption-controlled anodic peak was obtained in Britton—Robinson buffer at pH 2.0. By anodic adsorptive linear sweep and differential pulse voltammetry, l...

امیدفر, کبری , زارع, هاجر , میرزایی زاده, زهرا ,

Background: In this study, using anti-human serum albumin (HSA)-conjugated gold nanoparticles (AuNPs) as an electrochemical label and mobile crystalline material-41 (MCM-41)–polyvinyl alcohol (PVA) mesoporous nanocomposite as an immobilization platform, a new immunosensor was established. Methods: Field emission scanning electron microscopy (FESEM), cyclic voltammetry (CV), and diffe...

2010
J Mathiyarasu James Joseph

Phenol oxidation in aqueous solutions was carried out in a pH range of 7-12 using cyclic votlammetry (CV) and differential pulse voltammetry (DPV) studies on a glassy carbon electrode. Peak potentials are found to be distinct for each pH value. A linear relationship is observed between the peak current and the concentration ranging from microto millimolar levels. The peak current is found to be...

2015
S Devikala

Multi-walled carbon nanotubes (MWCNT) modified DNA based biosensors were prepared by immobilizing dsDNA over MWCNT coated graphite electrode. The film forming abilities of MWCNT coated graphite electrodes were studied using Electrochemical Impedance Spectroscopy (EIS) and Cyclic Voltammetry (CV) by placing the electrodes in electrolyte containing redox couple. Differential Pulse Voltammetry (DP...

2012
Pavla Macikova Vladimir Halouzka Jan Hrbac Petr Bartak Jana Skopalova

The performances of ionic liquid (1-hexyl-3-methylimidazolium-bis(trifluoromethylsulfonyl)imide, IL/CPE) and iron phthalocyanine (IP/CPE) modified carbon paste electrodes in electroanalytical determinations of rutin were evaluated and compared to the performance of unmodified carbon paste electrode (CPE). Cyclic voltammetry (CV), differential pulse voltammetry (DPV), differential pulse adsorpti...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2004
Liping Lu Shuqing Wang Xiangqin Lin

A novel biochemical sensor was fabricated on a carbon fiber microelectrode, which consisted of an inner layer of electrodeposited gold nanoparticles, as a nano-array electrode, and an outer layer of electrodeposited calf thymus ds-DNA at +1.5 V vs. SCE. This modified electrode was characterized by X-ray photoelectron spectroscopy, scanning electron microscope, atomic force microscopy, cyclic vo...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2004
Lingyan Jiang Chuanyin Liu Liping Jiang Zhen Peng Guanghan Lu

A chemically modified electrode based on a chitosan-multiwall carbon nanotube (MWNT) coated glassy carbon electrode (GCE) is described, which exhibits an attractive ability to determine dopamine (DA) and ascorbic acid (AA) simultaneously. The modified electrode exhibited a high differential pulse voltammetry (DPV) current response to DA at 0.144 V and AA at -0.029 V (vs. SCE) in a 0.1 mol l(-1)...

2015
Navid Nasirizadeh Zahra Shekari Masoumeh Tabatabaee Masoud Ghaani

A trifunctional electrochemical sensor was fabricated for simultaneous determination of ascorbic acid (AA), levodopa (LD), and insulin. This was done by modifying a glassy carbon electrode (GCE) with multi-walled carbon nanotubes and reactive blue 19 (RB-MWCNT-GCE). Cyclic voltammetry was used to investigate the redox properties of this modified electrode. The electro-catalytic activity of the ...

Journal: :Chemosensors 2023

This paper describes for the first time surface modification of glassy carbon (GC) electrodes with bamboo-based renewable (RC) and antimony nanoparticles (SbNPs) determination methylparaben (MePa) in personal care products (PCPs). The synthesized RC-SbNP material was successfully characterized by scanning electron microcopy, energy-dispersive X-ray spectroscopy cyclic voltammetry. proposed sens...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2006
Ming Guo Qing-Sen Yu

The electrochemical behavior of gatifloxacin (GTFX) and its interaction with natural calf thymus DNA (ctDNA) is investigated by differential pulse voltammetry (DPV) on a carbon paraffined electrode. According to the suggested electrochemical equation, a binding constant of 1.7058 x 10(5) (mol L(-1))(-1) and binding sizes s = 3.09 (base pairs) of GTFX with ctDNA are obtained by nonlinear fit ana...

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