| 摘要 |
PURPOSE:To separate and measure the concns. of two or more kinds of substrates by one set of an electrode system by providing layers of porous bodies having mutually different biologically related substances supported thereon on both sides of an electrode system constituted of a substrate permeable porous body. CONSTITUTION:When a sample solution containing glucose and pyruvic acid is dripped on a sensor, at first, glucose in the sample solution is decomposed in a triacetyl cellulose membrane 3 by glucose oxidase to generate hydrogen perioxide. Pyruvic acid in the sample solution is not reacted with glucose oxidase and passes through a measuring electrode 1 composed of conductively treated cloth containing a water absorbable polymer to reach the triacetyl cellulose membrane 4 under the electrode 1 and is decomposed by pyruvic acid oxidase to generate hydrogen peroxide. Since a time lag is generated between these reaction start times, pulse voltage is successively applied to the electrode system corresponding to the respective reaction start times and response currents are detected to measure the respective components. |
