Results 11 to 20 of about 127,136 (255)

Different Aspects of the Voltammetric Detection of Vitamins: A Review

Biosensors, 2023
Vitamins comprise a group of organic chemical compounds that contribute significantly to the normal functioning of living organisms. Although they are biosynthesized in living organisms, some are also obtained from the diet to meet the needs of organisms,
Denise Kiamiloglou, Stella Girousi
doaj   +1 more source

Electrocatalytic response of nitrogen-doped hollow carbon spheres modified glassy carbon electrode for sulphite detection in water

Journal of Electrochemical Science and Engineering, 2023
In this work, the glassy carbon electrode (GCE) surface was modified with nitrogen-doped hollow carbon spheres (N-HCSs) to achieve a new electrochemical  sulphite sensor (N-HCSs/GCE) in water samples.
Ashkan Basande, Hadi Beitollahi
doaj   +1 more source

Tendências em modificação de eletrodos amperométricos para aplicações eletroanalíticas Trends in amperometric electrodes modification for electroanalytical applications

Química Nova, 2002
The most relevant advances on the analytical applications of chemically modified electrodes (CME) are presented. CME have received great attention due to the possibility of electrode surface modification including chemisorption, composite generation and ...
Arnaldo César Pereira, Antonio de Santana Santos, Lauro Tatsuo Kubota   +2 more
doaj   +1 more source

Design and Construction of New Potentiometric Sensors for Determination of Copper(II) Ion Based on Copper Oxide Nanoparticles

International Journal of Electrochemical Science, 2015
New chemically modified carbon paste (CPEs) and screen-printed electrodes (SPEs) were fabricated incorborating copper oxide nanoparticles (CuO NPs) as a neutral ionophore and explored as Cu(II) selective electrodes.
Tamer Awad Ali, Gehad G. Mohamed, Ahmed R. Othman   +2 more
doaj   +3 more sources

Gold Electrodes Modified with Self-Assembled Layers Made of Sulphur Compounds and Gold Nanoparticles Used for Selective Electrocatalytic Oxidation of Catecholamine in the Presence of Interfering Ascorbic and Uric Acids

International Journal of Electrochemistry, 2011
Gold electrodes modified with S-containing compounds and gold nanoparticles were used for determination of epinephrine (EP) in aqueous solution. The modified electrodes exhibited a good sensitivity, reproducibility, and stability.
Teresa Łuczak
doaj   +1 more source

Recent Trends in the Development of Carbon-Based Electrodes Modified with Molecularly Imprinted Polymers for Antibiotic Electroanalysis

Chemosensors, 2022
Antibiotics are antibacterial agents applied in human and veterinary medicine. They are also employed to stimulate the growth of food-producing animals.
Daniel Preda, Iulia Gabriela David, Dana-Elena Popa, Mihaela Buleandra, Gabriel Lucian Radu   +4 more
doaj   +1 more source

Electrocatalytic Evolution of Oxygen Gas at Cobalt Oxide Nanoparticles Modified Electrodes

International Journal of Electrochemical Science, 2012
The electrocatalysis of oxygen evolution reaction (OER) at cobalt oxide nanoparticles (nano-CoOx) modified GC, Au and Pt electrodes has been examined using cyclic voltammetry.
Ibrahim M. Sadiek, Ahmad M. Mohammad, Mohamed E. El-Shakre, M. Ismail Awad, Mohamed S. El-Deab, Bahgat E. El-Anadouli   +5 more
doaj   +1 more source

Physical Surface Modification of Carbon-Nanotube/Polydimethylsiloxane Composite Electrodes for High-Sensitivity DNA Detection

Nanomaterials, 2021
The chemical modification of electrode surfaces has attracted significant attention for lowering the limit of detection or for improving the recognition of biomolecules; however, the chemical processes are complex, dangerous, and difficult to control ...
Junga Moon, Huaide Jiang, Eun-Cheol Lee
doaj   +1 more source

Determination of MCPA through Electrocatalysis by Manganese Species

International Journal of Electrochemical Science, 2007
MnO2-modified carbon paste (CP) electrodes and Mn-modified glassy carbon (GC) electrodes show the electrochemistry of Mn species which strongly depends on the solution pH.
Namal Priyantha, Ayanthi Navaratne, Sisira Weliwegamage and Chandima B. Ekanayake
doaj   +2 more sources

Glycerol Oxidation on Pd Electrodes Modified with Pt

International Journal of Electrochemical Science, 2014
The elelctrocatalytic oxidation of glycerol on Pd electrode modified with Pt is investigated. The Pt- modified Pd electrodes with different Pt loadings are prepared by means of potentiostatic deposition of Pt on polycrystalline Pd electrodes.
Changchun Jin, Jingjing Zhang, Rulin Dong, Qisheng Huo   +3 more
doaj   +1 more source