Improved selective electrocatalytic oxidation of phenols by tyrosinase-based carbon paste electrode biosensor

Kim R. Rogers, James Y. Becker, James Cembrano

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Tyrosinase-based carbon paste electrodes are evaluated with respect to the viscosity and polarity of the binder liquids. The electrodes constructed using a lower viscosity mineral oil yielded a greater response to phenol and catechol than those using a higher viscosity oil of similar chemical composition. Despite its relatively high viscosity, the use of silicon oil Si PS 086 as carbon paste binder resulted in a 2-fold increase over Si AR 200 and a 4-6 fold increase (over mineral oils) in responses to phenol, p-chlorophenol, and p-cresol. Also reported is the enhanced enzyme electrode response to phenol and catechol resulting from pre-oxidation of these substrates using a plain carbon paste electrode in a series (in-line) dual electrode configuration.

Original languageEnglish
Pages (from-to)4373-4379
Number of pages7
JournalElectrochimica Acta
Volume45
Issue number25-26
DOIs
StatePublished - 31 Aug 2000

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