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Three amperometric biosensors based on immobilization of tyrosinase on a new Sonogel–Carbon electrode for detection of phenols and polyphenols are described. The electrode was prepared using high energy ultrasounds (HEU) directly applied to the precursors. The first biosensor was obtained by simple adsorption of the enzyme on the Sonogel–Carbon electrode. The second and the third ones, presenting...
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