Enzyme Electrodes For Determination Of Phenol Concentration

Enzyme electrode for the determination of phenol concentration is investigated comprising a new type of porous hydrophobic carbon electrode (made from acetylene black treated with PTFE by a special technology) on which enzyme tyrosinase is immobilized. Oxygen needed for the enzymatic reaction can be transported to the immobilized enzyme in gas phase from the air through this carbon electrode. It is shown that the fast O/sub 2/ supply in gas phase results in an increase of the amperometric signal of the phenol electrode and in enlargement of the linear part of its calibration curve.