Results 1 to 10 of about 9,012 (156)
Some of the next articles are maybe not open access.
Activated carbon paste electrodes for biosensors
Analytical Chemistry, 1994A 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
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
openaire +2 more sources
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
openaire +2 more sources
Voltammetric determination of azithromycin at the carbon paste electrode
Talanta, 2004Azithromycin (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
Acid Stability of Carbon Paste Enzyme Electrodes
Analytical Chemistry, 2006This 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
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
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, 1989AbstractThe 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
A microscopic study on carbon paste electrodes
Electroanalysis, 1996AbstractScanning electron microscopy has been used for observing the surface of several types of carbon paste electrodes in order to reveal the role of both pasting liquid and carbon powder on the formation of the carbon paste structure. The effect of pasting liquid was studied using carbon pastes prepared from RW‐B multicrystalline graphite powder and
Ivan Švancara +4 more
openaire +1 more source
Electrooxidation of methadone on carbon paste electrodes
Electrochimica Acta, 1989Abstract The oxidation of methadone on carbon paste electrodes has been studied using voltammetric techniques under semi-infinite linear diffusion and hydrodynamic conditions. A simple “in situ” electrode pretreatment is proposed to obtain a good reproducibility of the current signal.
J.R. Barreira Rodriguez +2 more
openaire +1 more source
Metalloporphyrin containing carbon paste electrodes
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1985Abstract Iron and manganese tetraphenylporphyrin chlorides can be dissolved in 1-nonanol and mixed into a carbon paste electrode which in aqueous buffer exhibits the classic metal(III/II) cyclic voltammetry. The voltammetric formal potential shifts negatively by 60 mV/pH unit, and enhanced, electrocatalytic currents are observed in the presence of ...
Esther S. Takeuchi, Royce W. Murray
openaire +1 more source