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Title: Enzyme electrochemcial sensor electrode

Patent Application ·
OSTI ID:5708150

An electrochemical sensor electrode is formed from an electronic conductor coated with a casting solution containing a perfluorosulfonic acid ionomer and a selected enzyme. The selected enzyme catalyzes a reaction between a predetermined substance in a solution and oxygen to form an electrochemically active compound that is detected at the electronic conductor. The resulting perfluorosulfonic acid polymer provides a stable matrix for the enzyme for long lived enzyme activity, wherein only thin coatings are required on the metal conductor. The polymer also advantageously repels interfering substances from contacting the enzyme and contains quantities of oxygen to maintain a sensing capability during conditions of oxygen depletion in the sample. In one particular embodiment, glucose oxidase is mixed with the perfluorosulfonic acid ionomer to form an electrode for glucose detection. 3 figs.

Research Organization:
Los Alamos National Lab., NM (USA)
Sponsoring Organization:
USDOE; USDOE, Washington, DC (USA)
DOE Contract Number:
W-7405-ENG-36
Assignee:
Dept. of Energy
Patent Number(s):
PATENTS-US-A7448475
Application Number:
ON: DE91011653; PPN: US 7-448475
OSTI ID:
5708150
Country of Publication:
United States
Language:
English