Results 161 to 170 of about 43,372 (204)
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Carbon Paste Electrodes in Modern Electroanalysis
Critical Reviews in Analytical Chemistry, 2001Recent trends and advances in the electrochemistry with both unmodified and modified carbon paste electrodes are reviewed (247 refs.). Present day knowledge of their basic physico-chemical properties and characteristics is surveyed, including some specifics important in electrochemical measurements.
Ivan Švancara +3 more
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The zeolite-modified carbon paste electrode
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1988The electrochemical behavior of a Cu(II)-exchanged zeolite-modified electrode, constructed by incorporating the zeolite into the carbon powder + paraffin oil matrix used to manufacture a conventional carbon paste electrode, is investigated by cyclic voltammetric measurements.
N. El Murr +3 more
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Voltammetric study of glibenclamide at carbon paste and Sephadex-modified carbon paste electrodes
Analytical and Bioanalytical Chemistry, 2004The oxidative behaviour of the antidiabetic agent glibenclamide on a bare carbon paste electrode (CPE) and a Sephadex-modified carbon paste electrode (SMCPE) was explored by cyclic and differential pulse voltammetry (DPV). The analysis procedure consisted of an open circuit accumulation step in stirred sample solution of Britton-Robinson buffer (0.04 ...
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Biosensors and Bioelectronics, 1997
The effect of two types of carbon pastes and two osmium-based redox mediators on the response of amperometric enzyme electrodes for glucose was examined. A hydrophobic mediator and a hydrophilic cationic mediator were prepared and mixed in a paste that contained either mineral oil as the pasting liquid, or a polycationic electrolyte without oil. It was
J, Parellada +3 more
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The effect of two types of carbon pastes and two osmium-based redox mediators on the response of amperometric enzyme electrodes for glucose was examined. A hydrophobic mediator and a hydrophilic cationic mediator were prepared and mixed in a paste that contained either mineral oil as the pasting liquid, or a polycationic electrolyte without oil. It was
J, Parellada +3 more
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Lead dioxide-coated carbon paste electrodes
Analytica Chimica Acta, 1979Lead dioxide electrodeposited under optimized conditions on carbon paste provides an electroanalytically useful electrode, with an anodic working range extending to 1.9 V. Voltammograms for sulphite are used to study electrode lifetime and reproducibility; calibration graphs are linear up to 10-3M sulphite in 0.5 M sulphuric acid.
C. Efron, M. Ariel
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Chemically modified carbon paste and carbon composite electrodes
Electroanalysis, 1989AbstractCarbon paste electrodes and composite carbon electrodes modified by 20% silica gel (30 μm) within the electrode material exhibit many properties typical of a strand of carbon fiber microelectrodes in voltammetric measurements. Charged and uncharged species were studied on these electrodes; phenol, ferricyanide, and potassium ethylxanthogenate ...
Věra Stará, Miloslav Kopanica
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Electroanalysis, 2004
AbstractA new carbon electrode material, obtained by mixing single wall carbon nanotubes (SWNTs) with a mineral oil binder is studied. Carbon nanotube pastes show the special properties of carbon nanotubes combined with the various advantages of composite electrodes such as a very low capacitance (background current) and the possibility of an easy ...
ANTIOCHIA, RICCARDA +4 more
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AbstractA new carbon electrode material, obtained by mixing single wall carbon nanotubes (SWNTs) with a mineral oil binder is studied. Carbon nanotube pastes show the special properties of carbon nanotubes combined with the various advantages of composite electrodes such as a very low capacitance (background current) and the possibility of an easy ...
ANTIOCHIA, RICCARDA +4 more
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Detection of homocysteine at carbon nanotube paste electrodes
Talanta, 2004The use of a carbon-nanotube paste (CNTP) electrode provides an effective means for the determination of homocysteine. A decrease of ca. 120mV in the overpotential for the oxidation of homocysteine compared to a traditional carbon paste electrode, is reported along with greatly enhanced signal-to-noise characteristics.
Nathan S, Lawrence +2 more
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Electrochemical response of oligonucleotides on carbon paste electrode
Bioelectrochemistry, 2007Electrochemical response of synthetic oligonucleotides with different DNA bases sequences was investigated to find relationships between a chain composition and a signal. All DNA mononucleotides present electroactivity at a carbon paste electrode yielding anodic peaks at potentials: 1.00 (GMP), 1.28 (AMP), 1.47 (TMP) and 1.53 V (CMP).
I, Stempkowska +4 more
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Carbon Nanotube Purification: Preparation and Characterization of Carbon Nanotube Paste Electrodes
Analytical Chemistry, 2003Paste electrodes have been constructed using single-wall carbon nanotubes mixed with mineral oil. The electrochemical behavior of such electrodes prepared with different percentages of carbon nanotubes has been compared with that of graphite paste electrodes and evaluated with respect to the electrochemistry of ferricyanide with cyclic voltammetry ...
Valentini F +4 more
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