THE ELECTROCHEMICAL BIOSENSORS WITH PASTE ELECTRODES

The electrochemical behavior of electrodes prepared from platinum- and silver-containing pastes is studied. The electrode based on the plati num-containing paste is shown to have properties that are close to tho se inherent in the pure-platinum electrodes. It can be utilized for ma nufacturing electrodes for electrochemical biosensors that employ the oxidation current of hydrogen peroxide, which is the product of an enz ymatic reaction, for the substrate determination. The characteristics of an electrochemical biosensor intended for determining glucose with the aid of paste electrodes are reported. The developed design of the enzyme-containing layer, electrode batch, and electronic device allow one to determine glucose in whole blood in the concentration interval 2-15 mM.