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  • 1
    Electronic Resource
    Electronic Resource
    A potentiometric polypyrrole-based glucose biosensor (1996)
    Weinheim : Wiley-Blackwell
    Electroanalysis 8 (1996), S. 263-266 
    Details
    ISSN: 1040-0397
    Keywords: Electroactive polymer ; pH response ; Glucose oxidase ; Potentiometry ; Glucose determination ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A new concept is described for monitoring a biomolecule with a sensor having an enzyme entrapped in a conducting polymer. This is based on the sensitivity of the electroactive polymer itself to changes of pH in solution. The concept has been investigated for a glucose sensor with glucose oxidase (GOD) immobilized in a polypyrrole (PPy) layer on an inert platinum electrode. Measurements with a Pt/PPy/GOD electrode for glucose concentrations in the physiological range gave a linear correlation with logarithm of concentration over one decade with a satisfactory dynamic response. There was practically no change of slope or range of linear response to glucose after several days of use; this was in contrast to the amperometric response of the detector when there was about a 50% loss of sensitivity.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140080311
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  • 2
    Electronic Resource
    Electronic Resource
    Potentiometric monitoring of proteins: Part 5. A voltammetric study of copper electrodes (1992)
    Weinheim : Wiley-Blackwell
    Electroanalysis 4 (1992), S. 941-948 
    Details
    ISSN: 1040-0397
    Keywords: Amino acids ; Copper electrodes ; Oxide formation ; Potentiometry ; Proteins ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A voltammetric study has been made of copper electrodes in the presence and absence of amino acids and proteins. The results are discussed in terms of oxide formation on the copper surface and the complexation of the biomolecules with the copper. It is shown that in the presence of strongly complexing ligands, the copper surface is effectively self-cleaning, and reproducible potentiometric results can be obtained without any rigorous electrode precleaning procedures. In the presence of weakly complexing ligands, on the other hand, it is shown why it is necessary to reduce the electrode surface beforehand in order to carry out reproducible potentiometry.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140041005
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    Paper (German National Licenses)
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