Results 111 to 120 of about 10,400 (164)

Activated carbon paste electrodes for biosensors

Analytical Chemistry, 1994
A reagentless amperometric glucose biosensor was constructed using glucose oxidase and hydroquinone (H2Q) coimmobilized in carbon paste. The sensor response was studied by amperometry and cyclic voltammetry in quiescent solutions, as well as in a flow injection apparatus.
N, Motta, A R, Guadalupe
openaire   +2 more sources

Voltammetric determination of azithromycin at the carbon paste electrode

Talanta, 2004
Azithromycin (AZ) is the first member of a class of macrolide azalides antibiotics called azolides. A simple and selective square-wave voltammetric (SWV) method has been developed for the determination of azithromycin in pure form, in pharmaceutical preparation and in biological samples.
Othman Abd El-Moaty, Farghaly   +1 more
openaire   +2 more sources

Detection of homocysteine at carbon nanotube paste electrodes

Talanta, 2004
The 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
openaire   +2 more sources

Electrochemical response of oligonucleotides on carbon paste electrode

Bioelectrochemistry, 2007
Electrochemical 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
openaire   +2 more sources

Acid Stability of Carbon Paste Enzyme Electrodes

Analytical Chemistry, 2006
This note reports on the unusual protection of several enzymes against harsh pH conditions provided by carbon paste electrodes. Both glucose oxidase and polyphenol oxidase carbon paste amperometric biosensors display a remarkable resistance to acid deactivation compared to conventional biosensors prepared by electropolymeric entrapment of enzymes.
Joseph, Wang   +2 more
openaire   +2 more sources

A new type of hydrophilic carbon paste electrodes for biosensor manufacturing: binder paste electrodes

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
openaire   +2 more sources

Electrochemical behavior of iproplatin at the carbon paste electrode

Electroanalysis, 1989
AbstractThe electrochemical redox behavior of iproplatin (JM9) was investigated at the carbon paste electrode using cyclic voltammetry in the absence and presence of free chloride ions. In the absence of chloride, a diffusion‐controlled, two‐electron reduction peak (Epc1) is observed, giving a platinum(II) derivative that is oxidized to a Pt(IV ...
Kauffmann, Jean-Michel   +4 more
openaire   +2 more sources

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