Electrochemical determination of glucose using polyaniline electrode modified by glucose oxidize
AuthorsGvozdenović, Milica M.
Knežević Jugović, Zorica
Conference object (Published version)
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Polyaniline (PANI) enzyme electrode was formed by immobilization of Glucose oxidase (GOx) via glutaraldehyde into electrochemicaly polymerized PANI on graphite electrode. Electrochemical polymerization of PANI on graphite was performed from aqueous solution of 1.0 mol dm-3 HCl and 0.25 mol dm-3 aniline at constant current density of 2.0 mA cm-2. Hronopotentiometric curves of the PANI enzyme electrode obtained at current density of 10 μA cm-2 were recorded in different glucose concentrations. The linearity response range was between 1.0-5.0 mmol dm-3 of glucose concentration. The estimated apparent Michaelis-Menten constant, was Km ′ = 0.30 mmol dm-3, which is scientifically lower than that of free enzyme.
Keywords:glucose oxidase / polyaniline / immobilization / electrochemical synthesis
Source:The 61st Annual Meeting of the International Society of Electrochemistry: Electrochemistry from Biology to Physics September 26th - October 1st, 2010, Nice, France: Book of Abstracts, 2010, s11-P-041
- Nice : International Society of Electrochemistry