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MEDIATED AMPEROMETRIC ENZYME ELECTRODE INCORPORATING PEROXIDASE FOR THE DETERMINATION OF HYDROGEN-PEROXIDE IN ORGANIC-SOLVENTS
CRANFIELD INST TECHNOL,CTR BIOTECHNOL,CRANFIELD MK43 0AL,BEDS,ENGLAND; .
CRANFIELD INST TECHNOL,CTR BIOTECHNOL,CRANFIELD MK43 0AL,BEDS,ENGLAND; .
Cranfield University, UK.ORCID iD: 0000-0002-1815-9699
1991 (English)In: Analytica Chimica Acta, ISSN 0003-2670, E-ISSN 1873-4324, Vol. 245, no 2, 133-138 p.Article in journal (Refereed) Published
Abstract [en]

An amperometric enzyme electrode incorporating horseradish peroxidase is described for the determination of hydrogen peroxide in organic solvents. The enzyme was co-adsorbed with an electron mediator, potassium hexacyanoferrate(II), on the surface of a graphite foil electrode, making reagentless measurement possible. The electrochemical reduction of the enzymatically oxidized mediator was utilized as the analytical signal. Studies in different solvent systems revealed that the electrode could be operated in dioxane, chloroform and chlorobenzene, the last two providing approximately double the sensitivity of the former. The presence of a small amount of aqueous buffer was essential for sensor activity. During 2 weeks of intermittent use, the sensitivity of the electrode decreased to 40% of its initial value. At least 50 assays could be performed with a single sensor.

Place, publisher, year, edition, pages
Elsevier Science B.V., Amsterdam. , 1991. Vol. 245, no 2, 133-138 p.
Keyword [en]
AMPEROMETRY; ENZYME ELECTRODES; HYDROGEN PEROXIDE
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-65308ISI: A1991FL09000001OAI: oai:DiVA.org:liu-65308DiVA: diva2:394924
Available from: 2011-02-04 Created: 2011-02-04 Last updated: 2017-12-11

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TURNER, APF

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