Construction of modified enzyme electrode
A method is described for construction of a SOX/Fe3O4@GNPs/Au
electrode. Scheme 1 summarizes the different chemical reactions
involved in the fabrication of SOX electrode based on covalent
immobilization of SOX onto Fe3O4@GNPs/Au electrode through
amide bond formation between the free –COOH groups of carboxylated
Fe3O4@GNPs/Au electrode and free –NH2 groups on surface
of enzyme.