Results 191 to 200 of about 6,631 (247)
Voltammetric determination of Celiptium with carbon paste and lipid-modified carbon paste electrodes [PDF]
Analytica Chimica Acta, 1990 Abstract The electrooxidation of the antitumour drug 2-methyl-9-hydroxyellipticinium (Celiptium) was investigated by cyclic, differential-pulse and adsorptive voltammetry at carbon paste (CPE) and lipid-modified carbon paste electrodes (LM-CPE). The influence of the paste composition, i.e., the ratio of graphite to binder, was studied in order to ...
Kauffmann, Jean-Michel +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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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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Electrochemical behavior of marcellomycin at lipid-modified carbon-paste electrodes
Talanta, 1990A lipid-modified carbon-paste electrode is prepared by mixing phospholipids with the carbon-paste matrix. The resulting electrodes have polar head-groups which allow interactions with positively charged drugs and improved preconcentration/extraction steps.
Chastel, Olivier +3 more
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Organo-montmorillonites as carbon paste electrode modifiers
Journal of Solid State Electrochemistry, 2015Alkylammonium derivatives of montmorillonite (standards SAz-1 and SWy-2, Source Clay Repository (USA)) were prepared by sorption of hexadecyltrimethylammonium, benzyldimethylhexadecylammonium and hexadecylpyridinium cations. Characterization of the prepared alkylammonium montmorillonites by means of X-ray diffraction and infrared spectroscopy proved a ...
Zuzana Navrátilová, Martin Mucha
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Zeolite-modified solid carbon paste electrodes
Journal of Solid State Electrochemistry, 2003New zeolite-modified carbon-based electrodes are described. They are based either on the physical anchoring of zeolite particles on the surface of solid carbon paste (the viscosity of which can be tuned by temperature change or controlled dissolution by an organic solvent), or on the dispersion of zeolite particles in the bulk of a carbon paste matrix ...
Walcarius, Alain +2 more
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Determination of phenylephrine with a modified carbon paste electrode
Analytica Chimica Acta, 1995Abstract An anodic stripping voltammetric method for determination of phenylephrine with a modified carbon paste electrode is developed. The modified carbon paste electrode was prepared with carbon paste mixed with a cation exchange resin containing the functional group CO2Na. Linear scan voltammetry was used for the electrochemical measurements. The
J.C. Perlado +4 more
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Carbon paste electrodes electrochemically modified with cyclodextrins
Journal of Solid State Electrochemistry, 2003Cyclic voltammetry was used in order to obtain carbon paste electrodes (CPEs) modified with α- and β-cyclodextrins (CPEα-CD, CPEβ-CD) in HClO4 media as electrolyte. The modified CPEs were obtained by applying 30 potential cycles, thus forming on the substrate a film with electroactive characteristics; a rise in current for the anodic and cathodic peaks
Gabriela Roa Morales +2 more
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Talanta, 2007
The electrocatalytic oxidation of cephalexin and cefazolin has been studied at a carbon paste electrode modified with cobalt salophen (CoSal) by cyclic voltammetry. The selectivity of the carbon paste modified with CoSal in detecting cephalexin and cefazolin was examined. To suggest the electrocatalytic mechanism for electro-oxidation of cefazolin, the
E S, Jamasbi +4 more
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The electrocatalytic oxidation of cephalexin and cefazolin has been studied at a carbon paste electrode modified with cobalt salophen (CoSal) by cyclic voltammetry. The selectivity of the carbon paste modified with CoSal in detecting cephalexin and cefazolin was examined. To suggest the electrocatalytic mechanism for electro-oxidation of cefazolin, the
E S, Jamasbi +4 more
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Determination of Pb(II) with a Dithizone-Modified Carbon Paste Electrode
Journal of Environmental Science and Health, Part A, 2006A dithizone (DTZ) modified carbon paste electrode was developed for the sensitive and selective determination of Pb(II) using differential pulse anodic stripping voltammetry as well in batch as in FIA system. The analysis procedure is based on an open circuit accumulation step in a stirred sample solution.
Ma Dolores, Vázquez +2 more
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