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Determination of Glucose at the Ru(NH 3 ) 6 3+ ‐Based Paste Enzyme Electrode
Author(s) -
Chen Liang,
Gorski Waldemar
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200201)14:1<78::aid-elan78>3.0.co;2-6
Subject(s) - glucose oxidase , redox , electrode , graphite , chemistry , electrochemistry , inorganic chemistry , organic chemistry
This paper describes a paste enzyme electrode based on a mediator‐assisted electrical communication between redox active centers of glucose oxidase and graphite particles. The mediator is a solid inorganic redox salt composed of the Ru(NH 3 ) 6 3+ and Ru(CN) 6 4− ions. The actual redox mediation is hypothesized to be accomplished by the paste‐solubilized Ru(NH 3 ) 6 3+ /Ru(NH 3 ) 6 2+ couple that shuttles electrons between the enzyme and the graphite powder. The paste enzyme electrode operates at a potential of 0.0 V vs. Ag/AgCl/3M NaCl and displays superior analytical properties in terms of high operational stability, freedom from interferences, fast response time, extended long term stability, and ease of preparation.